144-707: The Greatest Generation , also known as the G.I. Generation and the World War II Generation , is the demographic cohort following the Lost Generation and preceding the Silent Generation . The social generation is generally defined as people born from 1901 to 1927. They were shaped by the Great Depression and were the primary generation composing the enlisted forces in World War II . Most people of
288-620: A Space Race against the Soviet Union , and his successor, Lyndon B. Johnson , further promoted a controversial " Great Society " policy. Research professor of sociology Glen Holl Elder, Jr. , a prominent figure in the development of life course theory , wrote Children of the Great Depression (1974), "the first longitudinal study of a Great Depression cohort." Elder followed 167 individuals born in California between 1920 and 1921 and "traced
432-468: A significant comparison, numbers must be altered for the size of the population that is under study. For example, the fertility rate is calculated as the ratio of the number of births to women of childbearing age to the total number of women in this age range. If these adjustments were not made, we would not know if a nation with a higher rate of births or deaths has a population with more women of childbearing age or more births per eligible woman. Within
576-457: A 2004 study done by AARP , "There are 26 million people aged 77 or older in the United States. These people are largely conservative on economic (59%) and social (49%) issues, and about one-third of them say they have become more conservative on economic, social, foreign policy, moral, and legal issues as they have aged. Over 9 in 10 (91%) of this age group are registered to vote and 90% voted in
720-484: A banjo or guitar. Regional styles of country blues varied widely in the early 20th century. The (Mississippi) Delta blues was a rootsy sparse style with passionate vocals accompanied by slide guitar. The little-recorded Robert Johnson combined elements of urban and rural blues. In addition to Robert Johnson, influential performers of this style included his predecessors Charley Patton and Son House . Singers such as Blind Willie McTell and Blind Boy Fuller performed in
864-415: A break; the harmony of this two-bar break, the turnaround, can be extremely complex, sometimes consisting of single notes that defy analysis in terms of chords. Much of the time, some or all of these chords are played in the harmonic seventh (7th) form. The use of the harmonic seventh interval is characteristic of blues and is popularly called the "blues seven". Blues seven chords add to the harmonic chord
1008-567: A center for electric blues from 1948 on, when Muddy Waters recorded his first success, "I Can't Be Satisfied". Chicago blues is influenced to a large extent by Delta blues , because many performers had migrated from the Mississippi region. Howlin' Wolf , Muddy Waters, Willie Dixon and Jimmy Reed were all born in Mississippi and moved to Chicago during the Great Migration. Their style
1152-471: A common element of popular culture in the western world, and media related to this generation's experiences continues to be produced. The romanticizing of this generation has faced criticism by some. However, some also praise the traits and actions of this generation and cite their sacrifices as a lesson for current generations. During the COVID-19 pandemic , living members of this generation have been impacted by
1296-399: A component of R&B. After World War II, new styles of electric blues became popular in cities such as Chicago , Memphis , Detroit and St. Louis . Electric blues used electric guitars , double bass (gradually replaced by bass guitar ), drums , and harmonica (or "blues harp") played through a microphone and a PA system or an overdriven guitar amplifier . Chicago became
1440-401: A country (or other entity) contains Population t persons at time t . What is the size of the population at time t + 1 ? Natural increase from time t to t + 1: Net migration from time t to t + 1: These basic equations can also be applied to subpopulations. For example, the population size of ethnic groups or nationalities within a given society or country is subject to
1584-519: A few rare individuals, such as Anna Del Priore, managed to survive infection from the Spanish flu and the COVID-19 pandemic approximately 100 years later. They also experienced much of their youth with rapid technological innovation (e.g., radio, telephone, automobile ) amidst growing levels of worldwide income inequality and a soaring economy. After the Stock Market crashed , when many had matured in
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#17328520799831728-484: A field of sociology , though there are a number of independent demography departments. These methods have primarily been developed to study human populations, but are extended to a variety of areas where researchers want to know how populations of social actors can change across time through processes of birth, death, and migration . In the context of human biological populations, demographic analysis uses administrative records to develop an independent estimate of
1872-676: A ground bass overlaid with complex treble patterns, while vocal supplies a third rhythmic layer. Similar techniques can be found in hundreds of blues records". The lyrics often relate troubles experienced within African American society. For instance Blind Lemon Jefferson 's "Rising High Water Blues" (1927) tells of the Great Mississippi Flood of 1927 : Backwater rising, Southern peoples can't make no time I said, backwater rising, Southern peoples can't make no time And I can't get no hearing from that Memphis girl of mine Although
2016-610: A movement known as the Great Migration . The long boom following World War II induced another massive migration of the African-American population, the Second Great Migration , which was accompanied by a significant increase of the real income of the urban blacks. The new migrants constituted a new market for the music industry. The term race record , initially used by the music industry for African-American music,
2160-460: A new product, and to analyze certain dynamics of a company's workforce. Choosing a new location for a branch of a bank, choosing the area in which to start a new supermarket, consulting a bank loan officer that a particular location would be a beneficial site to start a car wash, and determining what shopping area would be best to buy and be redeveloped in metropolis area are types of problems in which demographers can be called upon. Standardization
2304-456: A note with a frequency in a 7:4 ratio to the fundamental note. At a 7:4 ratio, it is not close to any interval on the conventional Western diatonic scale . For convenience or by necessity it is often approximated by a minor seventh interval or a dominant seventh chord . In melody , blues is distinguished by the use of the flattened third , fifth and seventh of the associated major scale . Blues shuffles or walking bass reinforce
2448-456: A number of songs, such as "Poor Rosy", that were popular among the slaves. Although she admitted being unable to describe the manner of singing she heard, Forten wrote that the songs "can't be sung without a full heart and a troubled spirit", conditions that have inspired countless blues songs. Though the use of the phrase in African-American music may be older, it has been attested to in print since 1912, when Hart Wand 's " Dallas Blues " became
2592-594: A part in early blues, citing Robert Johnson 's " Cross Road Blues " as a "thinly veiled reference to Eleggua , the orisha in charge of the crossroads". However, the Christian influence was far more obvious. The repertoires of many seminal blues artists, such as Charley Patton and Skip James , included religious songs or spirituals. Reverend Gary Davis and Blind Willie Johnson are examples of artists often categorized as blues musicians for their music, although their lyrics clearly belong to spirituals. The blues form
2736-569: A part of ragtime; Handy's signature work was the " Saint Louis Blues ". In the 1920s, the blues became a major element of African American and American popular music, also reaching white audiences via Handy's arrangements and the classic female blues performers. These female performers became perhaps the first African American "superstars", and their recording sales demonstrated "a huge appetite for records made by and for black people." The blues evolved from informal performances in bars to entertainment in theaters. Blues performances were organized by
2880-498: A period of transition where in demography emerged from statistics as a separate field of interest. This period included a panoply of international 'great demographers' like Adolphe Quetelet (1796–1874), William Farr (1807–1883), Louis-Adolphe Bertillon (1821–1883) and his son Jacques (1851–1922), Joseph Körösi (1844–1906), Anders Nicolas Kaier (1838–1919), Richard Böckh (1824–1907), Émile Durkheim (1858–1917), Wilhelm Lexis (1837–1914), and Luigi Bodio (1840–1920) contributed to
3024-419: A recording career that began in 1926 and spanned forty years. These recordings were typically labeled " race records " to distinguish them from records sold to white audiences. Nonetheless, the recordings of some of the classic female blues singers were purchased by white buyers as well. These blueswomen's contributions to the genre included "increased improvisation on melodic lines, unusual phrasing which altered
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#17328520799833168-406: A separate genre arose during the black migration from the countryside to urban areas in the 1920s and the simultaneous development of the recording industry. Blues became a code word for a record designed to sell to black listeners. The origins of the blues are closely related to the religious music of Afro-American community, the spirituals . The origins of spirituals go back much further than
3312-426: A standardized mortality rate (SMR) or standardized incidence rate (SIR). Population change is analyzed by measuring the change between one population size to another. Global population continues to rise, which makes population change an essential component to demographics. This is calculated by taking one population size minus the population size in an earlier census . The best way of measuring population change
3456-478: A time of rapid imperialism . One member of this generation, Hirohito , would become Emperor in 1926, when Japan was already one of the great powers . Nearly 18 million members of this generation would fight in World War II and approximately 3 million, including civilians, would be killed or wounded . Japanese cities, towns, and villages were devastated by Allied bombing campaigns. In an effort to prepare for
3600-499: A variety of demographic methods for modelling population processes. They include models of mortality (including the life table , Gompertz models , hazards models , Cox proportional hazards models , multiple decrement life tables , Brass relational logits), fertility (Hermes model, Coale -Trussell models, parity progression ratios ), marriage (Singulate Mean at Marriage, Page model), disability ( Sullivan's method , multistate life tables), population projections ( Lee-Carter model ,
3744-407: A victim of the post-war atmosphere of paranoia. Today, former Soviet states celebrate an annual Victory Day . The latest survey conducted by Russia's Levada Center suggests Victory Day is still one of the most important public holidays for Russian citizens, with 65% of those surveyed planning to celebrate it. But for nearly one third of people (31%) it is a "state public event" while for another 31% it
3888-581: A wide variety of styles and subgenres. Blues subgenres include country blues , Delta blues and Piedmont blues , as well as urban blues styles such as Chicago blues and West Coast blues . World War II marked the transition from acoustic to electric blues and the progressive opening of blues music to a wider audience, especially white listeners. In the 1960s and 1970s, a hybrid form called blues rock developed, which blended blues styles with rock music . The term 'Blues' may have originated from "blue devils", meaning melancholy and sadness. An early use of
4032-449: Is a cyclic musical form in which a repeating progression of chords mirrors the call and response scheme commonly found in African and African-American music. During the first decades of the 20th century blues music was not clearly defined in terms of a particular chord progression. With the popularity of early performers, such as Bessie Smith , use of the twelve-bar blues spread across
4176-519: Is a music genre and musical form that originated amongst African-Americans in the Deep South of the United States around the 1860s. Blues has incorporated spirituals , work songs , field hollers , shouts , chants , and rhymed simple narrative ballads from the African-American culture . The blues form is ubiquitous in jazz , rhythm and blues , and rock and roll , and is characterized by
4320-452: Is a "memorial day for all former Soviet people". Only 16% of those asked recognize it in its original context as a "veterans' memorial day". The predominant emotion the holiday provokes among Russians (59% of respondents) is national pride, while 18% said "sorrow" and 21% said "both". For modern Russians, the conflict continues to provide the population with a nationalistic rallying call. The World War II generation of Japan came of age during
4464-560: Is a sly wordplay with the double meaning of being " tight " with someone, coupled with a more salacious physical familiarity. Blues songs with sexually explicit lyrics were known as dirty blues . The lyrical content became slightly simpler in postwar blues, which tended to focus on relationship woes or sexual worries. Lyrical themes that frequently appeared in prewar blues, such as economic depression, farming, devils, gambling, magic, floods and drought, were less common in postwar blues. The writer Ed Morales claimed that Yoruba mythology played
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4608-421: Is a useful demographic technique used in the analysis of a business. It can be used as an interpretive and analytic tool for the comparison of different markets. These organizations have interests about the number and characteristics of their clients so they can maximize the sale of their products, their outlook on their influence, or the ends of their power, services, and beneficial works. Blues Blues
4752-417: Is because developed countries have proportionally more older people, who are more likely to die in a given year, so that the overall mortality rate can be higher even if the mortality rate at any given age is lower. A more complete picture of mortality is given by a life table , which summarizes mortality separately at each age. A life table is necessary to give a good estimate of life expectancy. Suppose that
4896-450: Is characterized by its lyrics , bass lines , and instrumentation . Early traditional blues verses consisted of a single line repeated four times. It was only in the first decades of the 20th century that the most common current structure became standard: the AAB pattern , consisting of a line sung over the four first bars, its repetition over the next four, and then a longer concluding line over
5040-431: Is likely to continue to rise. Populations can change through three processes: fertility, mortality, and migration. Fertility involves the number of children that women have and is to be contrasted with fecundity (a woman's childbearing potential). Mortality is the study of the causes, consequences, and measurement of processes affecting death to members of the population. Demographers most commonly study mortality using
5184-418: Is little evidence of Sub-Sahelian influence in the blues as "elaborate polyrhythm, percussion on African drums (as opposed to European drums), [and] collective participation" which are characteristic of West-Central African music below the savannah, are conspicuously absent. According to the historian Paul Oliver , "the roots of the blues were not to be found in the coastal and forest regions of Africa. Rather...
5328-709: Is often associated with solo piano, boogie-woogie was also used to accompany singers and, as a solo part, in bands and small combos. Boogie-woogie style was characterized by a regular bass figure, an ostinato or riff and shifts of level in the left hand, elaborating each chord and trills and decorations in the right hand. Boogie-woogie was pioneered by the Chicago-based Jimmy Yancey and the Boogie-Woogie Trio ( Albert Ammons , Pete Johnson and Meade Lux Lewis ). Chicago boogie-woogie performers included Clarence "Pine Top" Smith and Earl Hines , who "linked
5472-491: Is often associated with the California blues style, performed a successful transition from the early urban blues à la Lonnie Johnson and Leroy Carr to the jump blues style and dominated the blues-jazz scene at Los Angeles during the 1940s. The transition from country blues to urban blues that began in the 1920s was driven by the successive waves of economic crisis and booms that led many rural blacks to move to urban areas, in
5616-545: Is seen as the intellectual father of ideas of overpopulation and the limits to growth. Later, more sophisticated and realistic models were presented by Benjamin Gompertz and Verhulst . In 1855, a Belgian scholar Achille Guillard defined demography as the natural and social history of human species or the mathematical knowledge of populations, of their general changes, and of their physical, civil, intellectual, and moral condition. The period 1860–1910 can be characterized as
5760-602: Is sometimes referred to as the Interbellum Generation . The majority of veterans who served in World War II were born during the second half of this generation, from 1913 to 1924. While the oldest members of the Interbellum Generation came of age at the close of the 1910s in 1919, the majority reached maturity in the 1920s and the minority had grown up in the initial years of the Great Depression from 1929 to 1932. The "WWII Generation Proper" came of age in either
5904-473: Is the statistical study of human populations : their size, composition (e.g., ethnic group, age), and how they change through the interplay of fertility (births), mortality (deaths), and migration. Demographic analysis examines and measures the dimensions and dynamics of populations; it can cover whole societies or groups defined by criteria such as education , nationality , religion , and ethnicity . Educational institutions usually treat demography as
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6048-554: Is the case in much of the developing world, and most of historical demography . One of these techniques in contemporary demography is the sister method, where survey researchers ask women how many of their sisters have died or had children and at what age. With these surveys, researchers can then indirectly estimate birth or death rates for the entire population. Other indirect methods in contemporary demography include asking people about siblings, parents, and children. Other indirect methods are necessary in historical demography. There are
6192-432: Is today widely taught in many universities across the world, attracting students with initial training in social sciences, statistics or health studies. Being at the crossroads of several disciplines such as sociology , economics , epidemiology , geography , anthropology and history , demography offers tools to approach a large range of population issues by combining a more technical quantitative approach that represents
6336-510: Is used in a wide variety of contexts. For example, it is often used in business plans, to describe the population connected to the geographic location of the business. Demographic analysis is usually abbreviated as DA. For the 2010 U.S. Census, The U.S. Census Bureau has expanded its DA categories. Also as part of the 2010 U.S. Census, DA now also includes comparative analysis between independent housing estimates, and census address lists at different key time points. Patient demographics form
6480-421: Is using the intercensal percentage change. The intercensal percentage change is the absolute change in population between the censuses divided by the population size in the earlier census. Next, multiply this a hundredfold to receive a percentage . When this statistic is achieved, the population growth between two or more nations that differ in size, can be accurately measured and examined. For there to be
6624-634: The 2000 presidential election . The last member of this generation to be elected president was George H. W. Bush (1989–1993), and as of 2024 the last surviving president from this generation is Jimmy Carter (1977–1981). In its latter years, this generation was introduced to continued technological advancements such as mobile phones and the Internet. As of 2024 some 66,000 (under 1%) of the 16 million Americans who served in World War II remain alive. Living members of this generation are either in their late 90s or are centenarians . The lives of this generation are
6768-475: The American South sometimes referred to as a jitterbug or a one-string in the early twentieth century) and the banjo are African-derived instruments that may have helped in the transfer of African performance techniques into the early blues instrumental vocabulary. The banjo seems to be directly imported from West African music. It is similar to the musical instrument that griots and other Africans such as
6912-590: The Count Basie Orchestra were also concentrating on the blues, with 12-bar blues instrumentals such as Basie's " One O'Clock Jump " and " Jumpin' at the Woodside " and boisterous " blues shouting " by Jimmy Rushing on songs such as "Going to Chicago" and " Sent for You Yesterday ". A well-known big band blues tune is Glenn Miller 's " In the Mood ". In the 1940s, the jump blues style developed. Jump blues grew up from
7056-579: The Igbo played (called halam or akonting by African peoples such as the Wolof , Fula and Mandinka ). However, in the 1920s, when country blues began to be recorded, the use of the banjo in blues music was quite marginal and limited to individuals such as Papa Charlie Jackson and later Gus Cannon . Blues music also adopted elements from the "Ethiopian airs", minstrel shows and Negro spirituals , including instrumental and harmonic accompaniment. The style also
7200-707: The International Union for the Scientific Study of Population , or a national association such as the Population Association of America in the United States, or affiliates of the Federation of Canadian Demographers in Canada . Population composition is the description of population defined by characteristics such as age, race , sex or marital status . These descriptions can be necessary for understanding
7344-649: The Leslie Matrix ), and population momentum ( Keyfitz ). The United Kingdom has a series of four national birth cohort studies, the first three spaced apart by 12 years: the 1946 National Survey of Health and Development , the 1958 National Child Development Study , the 1970 British Cohort Study , and the Millennium Cohort Study , begun much more recently in 2000. These have followed the lives of samples of people (typically beginning with around 17,000 in each study) for many years, and are still continuing. As
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#17328520799837488-505: The Middle Ages , Christian thinkers devoted much time in refuting the Classical ideas on demography. Important contributors to the field were William of Conches , Bartholomew of Lucca , William of Auvergne , William of Pagula , and Muslim sociologists like Ibn Khaldun . One of the earliest demographic studies in the modern period was Natural and Political Observations Made upon
7632-741: The Theater Owners Booking Association in nightclubs such as the Cotton Club and juke joints such as the bars along Beale Street in Memphis. Several record companies, such as the American Record Corporation , Okeh Records , and Paramount Records , began to record African-American music. As the recording industry grew, country blues performers like Bo Carter , Jimmie Rodgers , Blind Lemon Jefferson , Lonnie Johnson , Tampa Red and Blind Blake became more popular in
7776-565: The United States and much of Europe ), registry statistics are the best method for estimating the number of births and deaths. A census is the other common direct method of collecting demographic data. A census is usually conducted by a national government and attempts to enumerate every person in a country. In contrast to vital statistics data, which are typically collected continuously and summarized on an annual basis, censuses typically occur only every 10 years or so, and thus are not usually
7920-512: The Yasukuni Shrine to pay tribute to their fallen comrades. Even after defeat, Japan would achieve unprecedented prosperity through businesses such as Sony Corporation (founded by Akio Morita ) and cultural influence, as in cinema by Akira Kurosawa . Demography Demography (from Ancient Greek δῆμος ( dêmos ) 'people, society' and -γραφία ( -graphía ) 'writing, drawing, description')
8064-455: The assumed Allied invasion , the Japanese government prepared to submit this generation to "Operation Ketsugo", in which the Japanese population would fight a war of attrition . Returning veterans found their country occupied and received little support or respect. Surviving members of this generation would see Japan emerge as the world's second-largest economy by 1989. Surviving veterans visit
8208-405: The call-and-response pattern, the blues scale , and specific chord progressions , of which the twelve-bar blues is the most common. Blue notes (or "worried notes"), usually thirds, fifths or sevenths flattened in pitch , are also an essential part of the sound. Blues shuffles or walking bass reinforce the trance-like rhythm and form a repetitive effect known as the groove . Blues music
8352-409: The degrees of the progression. For instance, for a blues in the key of C, C is the tonic chord (I) and F is the subdominant (IV). The last chord is the dominant (V) turnaround , marking the transition to the beginning of the next progression. The lyrics generally end on the last beat of the tenth bar or the first beat of the 11th bar, and the final two bars are given to the instrumentalist as
8496-681: The fall of the Berlin Wall and the creation of the European Union. Unlike the Western allies and the Soviet Union, Germany did not honor its veterans, as the association with Nazism continues in contemporary Germany today. As children, members of this generation came of age during Joseph Stalin 's rise to power. They endured the Holodomor famine , which killed millions. The World War II generation of
8640-666: The life table , a statistical device that provides information about the mortality conditions (most notably the life expectancy) in the population. Migration refers to the movement of persons from a locality of origin to a destination place across some predefined, political boundary. Migration researchers do not designate movements 'migrations' unless they are somewhat permanent. Thus, demographers do not consider tourists and travellers to be migrating. While demographers who study migration typically do so through census data on place of residence, indirect sources of data including tax forms and labour force surveys are also important. Demography
8784-433: The social dynamics from historical and comparative research. This data is often compared using a population pyramid . Population composition is also a very important part of historical research. Information ranging back hundreds of years is not always worthwhile, because the numbers of people for which data are available may not provide the information that is important (such as population size ). Lack of information on
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#17328520799838928-451: The spirituals . The first appearance of the blues is often dated to after the ending of slavery , with the development of juke joints occurring later. It is associated with the newly acquired freedom of the former slaves. Chroniclers began to report about blues music at the dawn of the 20th century. The first publication of blues sheet music was in 1908. Blues has since evolved from unaccompanied vocal music and oral traditions of slaves into
9072-438: The 1920s, among them "the big three"— Gertrude "Ma" Rainey , Bessie Smith , and Lucille Bogan . Mamie Smith , more a vaudeville performer than a blues artist, was the first African American to record a blues song, in 1920; her second record, "Crazy Blues", sold 75,000 copies in its first month. Ma Rainey, the "Mother of Blues", and Bessie Smith each "[sang] around center tones, perhaps in order to project her voice more easily to
9216-428: The 1920s, when the record industry created the marketing categories " race music " and " hillbilly music " to sell music by blacks for blacks and by whites for whites, respectively. At the time, there was no clear musical division between "blues" and "country", except for the ethnicity of the performer, and even that was sometimes documented incorrectly by record companies. Though musicologists can now attempt to define
9360-491: The 1930s, this generation experienced profound economic and social turmoil. Despite the hardships, historians note that the literature, arts, music, and cinema of the period flourished. This generation experienced what is commonly referred to as the " Golden Age of Hollywood ". A number of popular film genres, including gangster films , musical films , comedy films , and monster films attracted mass audiences. The Great Depression also greatly influenced literature and witnessed
9504-585: The 1960s in the form of the Vietnam War , civil rights movement , Watergate scandal , and a generational culture clash . Attitudes shaped during World War II clashed with those of the Vietnam era as many struggled to understand the general distrust of the government by the younger generations, while some supported anti-war protests. The same applied to a lesser extent in the 1950s between the Interbellum Generation and their Silent Generation children. According to
9648-451: The 9-bar progression in " Sitting on Top of the World ", by Walter Vinson . The basic 12-bar lyric framework of many blues compositions is reflected by a standard harmonic progression of 12 bars in a 4/4 time signature . The blues chords associated to a twelve-bar blues are typically a set of three different chords played over a 12-bar scheme. They are labeled by Roman numbers referring to
9792-542: The African American community. Kentucky-born Sylvester Weaver was in 1923 the first to record the slide guitar style, in which a guitar is fretted with a knife blade or the sawed-off neck of a bottle. The slide guitar became an important part of the Delta blues . The first blues recordings from the 1920s are categorized as a traditional, rural country blues and a more polished city or urban blues. Country blues performers often improvised, either without accompaniment or with only
9936-520: The African call-and-response tradition that transformed into an interplay of voice and guitar, the blues form itself bears no resemblance to the melodic styles of the West African griots . Additionally, there are theories that the four-beats-per-measure structure of the blues might have its origins in the Native American tradition of pow wow drumming. Some scholars identify strong influences on
10080-730: The Application of Probabilities to Life Contingencies (1838). In 1755, Benjamin Franklin published his essay Observations Concerning the Increase of Mankind, Peopling of Countries, etc. , projecting exponential growth in British colonies . His work influenced Thomas Robert Malthus , who, writing at the end of the 18th century, feared that, if unchecked, population growth would tend to outstrip growth in food production, leading to ever-increasing famine and poverty (see Malthusian catastrophe ). Malthus
10224-556: The Bills of Mortality (1662) by John Graunt , which contains a primitive form of life table . Among the study's findings were that one-third of the children in London died before their sixteenth birthday. Mathematicians, such as Edmond Halley , developed the life table as the basis for life insurance mathematics. Richard Price was credited with the first textbook on life contingencies published in 1771, followed later by Augustus De Morgan , On
10368-661: The COVID-19 pandemic. Members of the World War II generation in Germany came of age following World War I and the German Revolution of 1918–1919 . They faced economic hardships related to the Great Depression and Treaty of Versailles as unemployment rose to nearly 40%. Adolf Hitler then rose to power, and many of this generation joined organizations such as the Hitler Youth . In 1935, Hitler instituted military conscription. During
10512-511: The Cold War and the Space Race. Even in the mid-1980s, around 70% of Soviet industrial output was directed towards the military, one of the factors in its eventual economic collapse . Members of this generation are known as " Great Patriotic War " veterans, such as poet Yuri Levitansky who wrote about the horrors of the war and Vasily Zaitsev , a war hero who would later be detained for two years as
10656-453: The Eighth Army are a magnificent lot, and I have always said the greatest generation of Americans we have ever produced." The term was popularized by the title of a 1998 book by American journalist Tom Brokaw . In the book, Brokaw profiles American members of this generation who came of age during the Great Depression and went on to fight in World War II, as well as those who contributed to
10800-627: The Greatest Generation are the parents of the Silent Generation and Baby Boomers , and they are the children of the Lost Generation . An early usage of the term The Greatest Generation was in 1953 by U.S. Army General James Van Fleet , who had recently retired after his service in World War II and leading the Eighth Army in the Korean War . He spoke to Congress , saying, "The men of
10944-547: The Soviet Union was further decimated by the war. Stalin's scorched earth policy left its western regions in a state of devastation worsened by the advancing German Army. The USSR lost 14% of its pre-war population during WWII, a demographic collapse that would have immense long-term consequences. Mass, forced labor was often used and there were between 10 and 11 million Soviet men returning to help rebuild along with 2 million Soviet dissidents held prisoner in Stalin's Gulags . Then came
11088-463: The advent of comic books, which were popular with members of this generation with such characters as Doc Savage , the Shadow , Superman and Batman . Next to jazz , blues , gospel music , and folk music ; swing jazz became immensely popular with members of this generation. The term "Swing Generation" has also been used to describe the cohort due to the popularity of the era's music. The popularity of
11232-420: The back of a room". Smith would "sing a song in an unusual key, and her artistry in bending and stretching notes with her beautiful, powerful contralto to accommodate her own interpretation was unsurpassed". In 1920, the vaudeville singer Lucille Hegamin became the second black woman to record blues when she recorded "The Jazz Me Blues", and Victoria Spivey , sometimes called Queen Victoria or Za Zu Girl, had
11376-467: The basic demographic equation holds true by definition, in practice the recording and counting of events (births, deaths, immigration, emigration) and the enumeration of the total population size are subject to error. So allowance needs to be made for error in the underlying statistics when any accounting of population size or change is made. The figure in this section shows the latest (2004) UN ( United Nations ) WHO projections of world population out to
11520-544: The beginning of the 20th century. They are now lost. Other recordings that are still available were made in 1924 by Lawrence Gellert . Later, several recordings were made by Robert W. Gordon , who became head of the Archive of American Folk Songs of the Library of Congress . Gordon's successor at the library was John Lomax . In the 1930s, Lomax and his son Alan made a large number of non-commercial blues recordings that testify to
11664-696: The best source of data on births and deaths. Analyses are conducted after a census to estimate how much over or undercounting took place. These compare the sex ratios from the census data to those estimated from natural values and mortality data. Censuses do more than just count people. They typically collect information about families or households in addition to individual characteristics such as age, sex, marital status, literacy/education, employment status, and occupation, and geographical location. They may also collect data on migration (or place of birth or of previous residence), language, religion, nationality (or ethnicity or race), and citizenship. In countries in which
11808-647: The blues from the melodic structures of certain West African musical styles of the savanna and sahel. Lucy Durran finds similarities with the melodies of the Bambara people , and to a lesser degree, the Soninke people and Wolof people , but not as much of the Mandinka people . Gerard Kubik finds similarities to the melodic styles of both the west African savanna and central Africa, both of which were sources of enslaved people. No specific African musical form can be identified as
11952-443: The blues gained an association with misery and oppression, the lyrics could also be humorous and raunchy: Rebecca, Rebecca, get your big legs off of me, Rebecca, Rebecca, get your big legs off of me, It may be sending you baby, but it's worrying the hell out of me. Hokum blues celebrated both comedic lyrical content and a boisterous, farcical performance style. Tampa Red and Georgia Tom 's " It's Tight Like That " (1928)
12096-568: The blues in the same year in Missouri ; and W.C. Handy , who first heard the blues in Tutwiler, Mississippi , in 1903. The first extensive research in the field was performed by Howard W. Odum , who published an anthology of folk songs from Lafayette County, Mississippi , and Newton County, Georgia , between 1905 and 1908. The first non-commercial recordings of blues music, termed proto-blues by Paul Oliver , were made by Odum for research purposes at
12240-460: The blues is usually dated after the Emancipation Act of 1863 , between 1860s and 1890s, a period that coincides with post- emancipation and later, the establishment of juke joints as places where African-Americans went to listen to music, dance, or gamble after a hard day's work. This period corresponds to the transition from slavery to sharecropping, small-scale agricultural production, and
12384-516: The blues narrowly in terms of certain chord structures and lyric forms thought to have originated in West Africa, audiences originally heard the music in a far more general way: it was simply the music of the rural south, notably the Mississippi Delta . Black and white musicians shared the same repertoire and thought of themselves as " songsters " rather than blues musicians. The notion of blues as
12528-459: The blues was rooted in ... the savanna hinterland, from Senegambia through Mali, Burkina Faso, Northern Ghana, Niger, and northern Nigeria". Additionally, ethnomusicologist John Storm Roberts has argued that "The parallels between African savanna-belt string-playing and the techniques of many blues guitarists are remarkable. The big kora of Senegal and Guinea are played in a rhythmic-melodic style that uses constantly changing rhythms, often providing
12672-411: The blues, usually dating back to the middle of the 18th century, when the slaves were Christianized and began to sing and play Christian hymns , in particular those of Isaac Watts , which were very popular. Before the blues gained its formal definition in terms of chord progressions, it was defined as the secular counterpart of spirituals. It was the low-down music played by rural blacks. Depending on
12816-479: The boogie-woogie wave and was strongly influenced by big band music. It uses saxophone or other brass instruments and the guitar in the rhythm section to create a jazzy, up-tempo sound with declamatory vocals. Jump blues tunes by Louis Jordan and Big Joe Turner , based in Kansas City, Missouri , influenced the development of later styles such as rock and roll and rhythm and blues. Dallas-born T-Bone Walker , who
12960-518: The category of standardization , there are two major approaches: direct standardization and indirect standardization. A stable population does not necessarily remain fixed in size. It can be expanding or shrinking. The crude death rate as defined above and applied to a whole population can give a misleading impression. For example, the number of deaths per 1,000 people can be higher in developed nations than in less-developed countries, despite standards of health being better in developed countries. This
13104-553: The core of the data for any medical institution, such as patient and emergency contact information and patient medical record data. They allow for the identification of a patient and their categorization into categories for the purpose of statistical analysis. Patient demographics include: date of birth , gender , date of death , postal code, ethnicity, blood type , emergency contact information, family doctor, insurance provider data, allergies , major diagnoses and major medical history. Formal demography limits its object of study to
13248-494: The core of the discipline with many other methods borrowed from social or other sciences. Demographic research is conducted in universities, in research institutes, as well as in statistical departments and in several international agencies. Population institutions are part of the CICRED (International Committee for Coordination of Demographic Research) network while most individual scientists engaged in demographic research are members of
13392-528: The development of demography and to the toolkit of methods and techniques of demographic analysis. Demography is the statistical and mathematical study of the size, composition, and spatial distribution of human populations and how these features change over time. Data are obtained from a census of the population and from registries: records of events like birth , deaths , migrations, marriages, divorces , diseases, and employment . To do this, there needs to be an understanding of how they are calculated and
13536-644: The distribution and abundance of organisms. As it relates to organizations and demography, organizations go through various liabilities to their continued survival. Hospitals, like all other large and complex organizations are impacted in the environment they work. For example, a study was done on the closure of acute care hospitals in Florida between a particular time. The study examined effect size, age, and niche density of these particular hospitals. A population theory says that organizational outcomes are mostly determined by environmental factors . Among several factors of
13680-479: The emphasis and impact of the lyrics, and vocal dramatics using shouts, groans, moans, and wails. The blues women thus effected changes in other types of popular singing that had spin-offs in jazz, Broadway musicals , torch songs of the 1930s and 1940s, gospel , rhythm and blues , and eventually rock and roll ." Urban male performers included popular black musicians of the era, such as Tampa Red , Big Bill Broonzy and Leroy Carr . An important label of this era
13824-429: The expansion of railroads in the southern United States. Several scholars characterize the development of blues music in the early 1900s as a move from group performance to individualized performance. They argue that the development of the blues is associated with the newly acquired freedom of the enslaved people. According to Lawrence Levine, "there was a direct relationship between the national ideological emphasis upon
13968-408: The family. The causes of turnover can be split into two separate factors, one linked with the culture of the organization, and the other relating to all other factors. People who do not fully accept a culture might leave voluntarily. Or, some individuals might leave because they fail to fit in and fail to change within a particular organization. A basic definition of population ecology is a study of
14112-430: The first copyrighted blues composition. In lyrics, the phrase is often used to describe a depressed mood. Early traditional blues verses often consisted of a single line repeated four times. However, the most common structure of blues lyrics today was established in the first few decades of the 20th century, known as the "AAB" pattern. This structure consists of a line sung over the first four bars, its repetition over
14256-535: The form of a loose narrative. African-American singers voiced their "personal woes in a world of harsh reality: a lost love, the cruelty of police officers, oppression at the hands of white folk, [and] hard times". This melancholy has led to the suggestion of an Igbo origin for blues, because of the reputation the Igbo had throughout plantations in the Americas for their melancholic music and outlook on life when they were enslaved. Other historians have argued that there
14400-417: The genre took its shape from the idiosyncrasies of individual performers. However, there are some characteristics that were present long before the creation of the modern blues. Call-and-response shouts were an early form of blues-like music; they were a "functional expression ... style without accompaniment or harmony and unbounded by the formality of any particular musical structure". A form of this pre-blues
14544-454: The huge variety of proto-blues styles, such as field hollers and ring shouts . A record of blues music as it existed before 1920 can also be found in the recordings of artists such as Lead Belly and Henry Thomas . All these sources show the existence of many different structures distinct from twelve- , eight- , or sixteen-bar . The social and economic reasons for the appearance of the blues are not fully known. The first appearance of
14688-400: The impact of Depression and wartime experiences from the early years to middle age. Most of these 'children of the Great Depression' fared unusually well in their adult years". They came out of the hardships of the Great Depression "with an ability to know how to survive and make do and solve problems." This generation faced turmoil with their older baby boomer children upon their maturing in
14832-434: The individual, the popularity of Booker T. Washington's teachings, and the rise of the blues." Levine stated that "psychologically, socially, and economically, African-Americans were being acculturated in a way that would have been impossible during slavery, and it is hardly surprising that their secular music reflected this as much as their religious music did." There are few characteristics common to all blues music, because
14976-408: The last bars. Early blues frequently took the form of a loose narrative, often relating the racial discrimination and other challenges experienced by African-Americans. Many elements, such as the call-and-response format and the use of blue notes, can be traced back to the music of Africa . The origins of the blues are also closely related to the religious music of the African-American community,
15120-586: The low rate of literacy among rural African Americans at the time. Reports of blues music in southern Texas and the Deep South were written at the dawn of the 20th century. Charles Peabody mentioned the appearance of blues music at Clarksdale, Mississippi , and Gate Thomas reported similar songs in southern Texas around 1901–1902. These observations coincide more or less with the recollections of Jelly Roll Morton , who said he first heard blues music in New Orleans in 1902; Ma Rainey , who remembered first hearing
15264-418: The measurement of population processes, while the broader field of social demography or population studies also analyses the relationships between economic, social, institutional, cultural, and biological processes influencing a population. Demographic thoughts traced back to antiquity, and were present in many civilisations and cultures, like Ancient Greece , Ancient Rome , China and India . Made up of
15408-516: The music industry during the 1920s and 1930s. Other chord progressions, such as 8-bar forms, are still considered blues; examples include " How Long Blues ", " Trouble in Mind ", and Big Bill Broonzy 's " Key to the Highway ". There are also 16-bar blues , such as Ray Charles 's instrumental "Sweet 16 Bars" and Herbie Hancock 's " Watermelon Man ". Idiosyncratic numbers of bars are occasionally used, such as
15552-413: The nation will become a nation of immigrants. This influx is projected to rise over the next century as new immigrants and their children will account for over half the U.S. population. These demographic shifts could ignite major adjustments in the economy, more specifically, in labor markets. People decide to exit organizations for many reasons, such as, better jobs, dissatisfaction, and concerns within
15696-452: The next four, and a longer concluding line over the last bars. This pattern can be heard in some of the first published blues songs, such as " Dallas Blues " (1912) and " Saint Louis Blues " (1914). According to W.C. Handy , the "AAB" pattern was adopted to avoid the monotony of lines repeated three times. The lyrics are often sung in a rhythmic talk style rather than a melody, resembling a form of talking blues . Early blues frequently took
15840-458: The original data-collection procedures may prevent accurate evaluation of data quality. The demographic analysis of labor markets can be used to show slow population growth, population aging , and the increased importance of immigration. The U.S. Census Bureau projects that in the next 100 years, the United States will face some dramatic demographic changes. The population is expected to grow more slowly and age more rapidly than ever before and
15984-502: The pandemic, such as Major Lee Wooten, who was treated in hospital for covid and recovered just before his 104th birthday in 2020; he died aged 105. In Britain, this generation came of age, like most of the western world, during a period of economic hardship as a result of the Great Depression . When the war in Europe began, millions of British citizens joined the war effort at home and abroad. Over 6 million members of this generation served in
16128-528: The population. Demographic analysis estimates are often considered a reliable standard for judging the accuracy of the census information gathered at any time. In the labor force , demographic analysis is used to estimate sizes and flows of populations of workers; in population ecology the focus is on the birth, death, migration and immigration of individuals in a population of living organisms, alternatively, in social human sciences could involve movement of firms and institutional forms. Demographic analysis
16272-512: The prefix demo- and the suffix -graphy , the term demography refers to the overall study of population. In ancient Greece, this can be found in the writings of Herodotus , Thucydides , Hippocrates , Epicurus , Protagoras , Polus , Plato and Aristotle . In Rome, writers and philosophers like Cicero , Seneca , Pliny the Elder , Marcus Aurelius , Epictetus , Cato , and Columella also expressed important ideas on this ground. In
16416-489: The propulsive left-hand rhythms of the ragtime pianists with melodic figures similar to those of Armstrong's trumpet in the right hand". The smooth Louisiana style of Professor Longhair and, more recently, Dr. John blends classic rhythm and blues with blues styles. Another development in this period was big band blues. The " territory bands " operating out of Kansas City , the Bennie Moten orchestra, Jay McShann , and
16560-566: The questions they answer which are included in these four concepts: population change , standardization of population numbers, the demographic bookkeeping equation, and population composition. There are two types of data collection —direct and indirect—with several methods of each type. Direct data comes from vital statistics registries that track all births and deaths as well as certain changes in legal status such as marriage, divorce, and migration (registration of place of residence). In developed countries with good registration systems (such as
16704-595: The radio also became a major influence in the lives of this generation, as millions tuned in to listen to President Franklin D. Roosevelt 's " fireside chats " and absorbed the news in a way like never before. Over 16 million Americans served in World War II, the majority being members of this generation. 38.8% were volunteers, 61.2% were draftees, the average length of their service was 33 months, and total approximate casualties were 671,278 ( killed and wounded ). American journalist Tom Brokaw and others extol this generation for supporting and fighting World War II. Following
16848-458: The religious community a musician belonged to, it was more or less considered a sin to play this low-down music: blues was the devil's music. Musicians were therefore segregated into two categories: gospel singers and blues singers, guitar preachers and songsters. However, when rural black music began to be recorded in the 1920s, both categories of musicians used similar techniques: call-and-response patterns, blue notes, and slide guitars. Gospel music
16992-417: The same sources of change. When dealing with ethnic groups, however, "net migration" might have to be subdivided into physical migration and ethnic reidentification ( assimilation ). Individuals who change their ethnic self-labels or whose ethnic classification in government statistics changes over time may be thought of as migrating or moving from one population subcategory to another. More generally, while
17136-447: The samples have been drawn in a nationally representative way, inferences can be drawn from these studies about the differences between four distinct generations of British people in terms of their health, education, attitudes, childbearing and employment patterns. Indirect standardization is used when a population is small enough that the number of events (births, deaths, etc.) are also small. In this case, methods must be used to produce
17280-553: The second half of the 1930s or the early years of the 1940s. US members of this generation came of age as early as 1919 and as late as 1945, were children, or were born during the Progressive Era , World War I , and the Roaring Twenties ; a time of economic prosperity with distinctive cultural transformations. Additionally, many of those alive from 1918 through 1920 experienced the deadly Spanish flu pandemic; and, incredibly,
17424-510: The single direct ancestor of the blues. However the call-and-response format can be traced back to the music of Africa . That blue notes predate their use in blues and have an African origin is attested to by "A Negro Love Song", by the English composer Samuel Coleridge-Taylor , from his African Suite for Piano , written in 1898, which contains blue third and seventh notes . The Diddley bow (a homemade one-stringed instrument found in parts of
17568-406: The southeastern "delicate and lyrical" Piedmont blues tradition, which used an elaborate ragtime-based fingerpicking guitar technique. Georgia also had an early slide tradition, with Curley Weaver , Tampa Red , "Barbecue Bob" Hicks and James "Kokomo" Arnold as representatives of this style. The lively Memphis blues style, which developed in the 1920s and 1930s near Memphis, Tennessee ,
17712-466: The term "blues" was associated with drinking alcohol, a meaning which survives in the phrase ' blue law ', which prohibits the sale of alcohol on Sunday. In 1827, it was in the sense of a sad state of mind that John James Audubon wrote to his wife that he "had the blues". In Henry David Thoreau 's book Walden , he mentions "the blues" in the chapter reflecting on his time in solitude. He wrote his account of his personal quest in 1845, although it
17856-465: The term in this sense is in George Colman 's one-act farce Blue Devils (1798). The phrase 'blue devils' may also have been derived from a British usage of the 1600s referring to the "intense visual hallucinations that can accompany severe alcohol withdrawal". As time went on, the phrase lost the reference to devils and came to mean a state of agitation or depression. By the 1800s in the United States,
18000-404: The theory, there are four that apply to the hospital closure example: size, age, density of niches in which organizations operate, and density of niches in which organizations are established. Problems in which demographers may be called upon to assist business organizations are when determining the best prospective location in an area of a branch store or service outlet, predicting the demand for
18144-446: The trance-like rhythm and call-and-response, and they form a repetitive effect called a groove . Characteristic of the blues since its Afro-American origins, the shuffles played a central role in swing music . The simplest shuffles, which were the clearest signature of the R&;B wave that started in the mid-1940s, were a three-note riff on the bass strings of the guitar. When this riff
18288-474: The vital registration system may be incomplete, the censuses are also used as a direct source of information about fertility and mortality; for example, the censuses of the People's Republic of China gather information on births and deaths that occurred in the 18 months immediately preceding the census. Indirect methods of collecting data are required in countries and periods where full data are not available, such as
18432-434: The war effort on the home front. Brokaw wrote that these men and women fought not for fame or recognition, but because it was the "right thing to do". This cohort is also referred to as the "G.I. Generation" and the "World War II Generation". Pew Research Center defines this cohort as being born from 1901 to 1927. Strauss and Howe use the birth years 1901–1924. The first half of this generation, born between 1901 and 1912,
18576-476: The war, and there were 384,000 casualties. At home, the Blitz claimed the lives of thousands and destroyed entire British cities. The men and women of this generation continue to be honored in the U.K., particularly on V-E Day . In 2020, British Prime Minister Boris Johnson compared this generation to current generations and indicated his desire for them to show the "same spirit of national endeavour", in relation to
18720-491: The war, nearly 12.5 million members of this generation served in the war and 4.3 million were killed or wounded. By the end of the war, 5 million Germans were dead, including civilians. German cities and towns were devastated by Allied bombing campaigns. 12 million Germans were refugees and many were forced to settle in the Soviet Union. In addition, the Holocaust claimed the lives of millions of German Jews and others. Following
18864-613: The war, the Allies began the denazification and demilitarization of a post-war Germany. Returning German veterans found their country carved up into four zones of occupation; later becoming West Germany and East Germany . In the west, the Marshall Plan resulted in the " Wirtschaftswunder ", an economic boom that caused 185% growth between 1950 and 1963. Surviving members of the German World War II generation would go on to experience
19008-549: The war, this generation produced children at an unprecedented level. Over 76 million babies were born between 1946 and 1964. Subsidized by the G.I. Bill , this generation moved their families into the suburbs and largely promoted a more conservative mindset as the country faced the challenge of the Cold War , as some were again called to service in the Korean War alongside the Silent Generation . The first member of their generation to be elected US president, John F. Kennedy , began
19152-518: The year 2150 (red = high, orange = medium, green = low). The UN "medium" projection shows world population reaching an approximate equilibrium at 9 billion by 2075. Working independently, demographers at the International Institute for Applied Systems Analysis in Austria expect world population to peak at 9 billion by 2070. Throughout the 21st century, the average age of the population
19296-532: Was a formally trained musician, composer and arranger who helped to popularize the blues by transcribing and orchestrating blues in an almost symphonic style, with bands and singers. He became a popular and prolific composer, and billed himself as the "Father of the Blues"; however, his compositions can be described as a fusion of blues with ragtime and jazz, a merger facilitated using the Cuban habanera rhythm that had long been
19440-399: Was closely related to ragtime , which developed at about the same time, though the blues better preserved "the original melodic patterns of African music". The musical forms and styles that are now considered the blues as well as modern country music arose in the same regions of the southern United States during the 19th century. Recorded blues and country music can be found as far back as
19584-457: Was heard in slave ring shouts and field hollers , expanded into "simple solo songs laden with emotional content". Blues has evolved from the unaccompanied vocal music and oral traditions of slaves imported from West Africa and rural blacks into a wide variety of styles and subgenres, with regional variations across the United States. Although blues (as it is now known) can be seen as a musical style based on both European harmonic structure and
19728-567: Was influenced by jug bands such as the Memphis Jug Band or the Gus Cannon's Jug Stompers . Performers such as Frank Stokes , Sleepy John Estes , Robert Wilkins , Kansas Joe McCoy , Casey Bill Weldon and Memphis Minnie used a variety of unusual instruments such as washboard , fiddle , kazoo or mandolin . Memphis Minnie was famous for her virtuoso guitar style. Pianist Memphis Slim began his career in Memphis, but his distinct style
19872-659: Was nevertheless using musical forms that were compatible with Christian hymns and therefore less marked by the blues form than its secular counterpart. The American sheet music publishing industry produced a great deal of ragtime music. By 1912, the sheet music industry had published three popular blues-like compositions, precipitating the Tin Pan Alley adoption of blues elements: "Baby Seals' Blues", by Baby Franklin Seals (arranged by Artie Matthews ); "Dallas Blues", by Hart Wand ; and " The Memphis Blues ", by W.C. Handy . Handy
20016-474: Was not published until 1854. The phrase "the blues" was written by Charlotte Forten , then aged 25, in her diary on December 14, 1862. She was a free-born black woman from Pennsylvania who was working as a schoolteacher in South Carolina, instructing both slaves and freedmen, and wrote that she "came home with the blues" because she felt lonesome and pitied herself. She overcame her depression and later noted
20160-420: Was played over the bass and the drums, the groove "feel" was created. Shuffle rhythm is often vocalized as " dow , da dow , da dow , da" or " dump , da dump , da dump , da": it consists of uneven, or "swung", eighth notes. On a guitar this may be played as a simple steady bass or it may add to that stepwise quarter note motion from the fifth to the sixth of the chord and back. Hart Wand 's " Dallas Blues "
20304-430: Was published in 1912; W.C. Handy 's " The Memphis Blues " followed in the same year. The first recording by an African American singer was Mamie Smith 's 1920 rendition of Perry Bradford 's " Crazy Blues ". But the origins of the blues were some decades earlier, probably around 1890. This music is poorly documented, partly because of racial discrimination in U.S. society, including academic circles, and partly because of
20448-507: Was replaced by the term rhythm and blues . This rapidly evolving market was mirrored by Billboard magazine's Rhythm & Blues chart . This marketing strategy reinforced trends in urban blues music such as the use of electric instruments and amplification and the generalization of the blues beat, the blues shuffle , which became ubiquitous in rhythm and blues (R&B). This commercial stream had important consequences for blues music, which, together with jazz and gospel music , became
20592-444: Was smoother and had some swing elements. Many blues musicians based in Memphis moved to Chicago in the late 1930s or early 1940s and became part of the urban blues movement. City or urban blues styles were more codified and elaborate, as a performer was no longer within their local, immediate community, and had to adapt to a larger, more varied audience's aesthetic. Classic female urban and vaudeville blues singers were popular in
20736-536: Was the Chicago-based Bluebird Records . Before World War II, Tampa Red was sometimes referred to as "the Guitar Wizard". Carr accompanied himself on the piano with Scrapper Blackwell on guitar, a format that continued well into the 1950s with artists such as Charles Brown and even Nat "King" Cole . Boogie-woogie was another important style of 1930s and early 1940s urban blues. While the style
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