A human race is a grouping of humankind based on shared physical or social qualities that can vary from one society to another. Historically, the concept of race has changed across cultures and eras, and has eventually become less connected with ancestral and familial ties, and more concerned with superficial physical characteristics. In the past, theorists developed categories of race based on various geographic regions, ethnicities, skin colors, and more. Their labels for racial groups have connoted regions or skin tones, for example. German physician, zoologist, and anthropologist Johann Friedrich Blumenbach (1752-1840) introduced one of the famous groupings by studying human skulls. Blumenbach divided humans into five races (MacCord 2014): Caucasian or White race: people of European, Middle Eastern, and North African origin Ethiopian or Black race: people of sub-Saharan Africans origin (sometimes spelled Aethiopian) Malayan or Brown race: people of Southeast Asian origin and Pacific Islanders Mongolian or Yellow race: people of all East Asian and some Central Asian origin American or Red race: people of North American origin or American Indians Over time, descriptions of race like Blumenbach's have fallen into disuse, and the social construction of race is a more accepted way of understanding racial categories. Social science organizations including the American Association of Anthropologists, the American Sociological Association, and the American Psychological Association have all officially rejected explanations of race like those listed above. Research in this school of thought suggests that race is not biologically identifiable and that previous racial categories were based on pseudoscience; they were often used to justify racist practices (Omi and Winant 1994; Graves 2003). For example, some people used to think that genetics of race determined intelligence. While this idea was mostly put to rest in the later 20th Century, it resurged several times in the past 50 years, including the widely read and cited 1994 book, The Bell Curve. Researchers have since provided substantial evidence that refutes a biological-racial basis for intelligence, including the widespread closing of IQ gaps as Black people gained more access to education (Dickens 2006). This research and other confirming studies indicate that any generally lower IQ among a racial group was more about nurture than nature, to put it into the terms of the Socialization chapter. While many of the historical considerations of race have been corrected in favor of more accurate and sensitive descriptions, some of the older terms remain. For example, it is generally unacceptable and insulting to refer to Asian people or Native American people with color-based terminology, but it is acceptable to refer to White and Black people in that way. In 2020, a number of publications announced that they would begin capitalizing the names of races, though not everyone used the same approach (Seipel 2020). This practice comes nearly a hundred years after sociologist and leader W.E.B. Du Bois drove newsrooms to capitalize "Negro," the widely used term at the time. And, finally, some members of racial groups (or ethnic groups, which are described below) "reclaim" terms previously used to insult them (Rao 2018). These examples are more evidence of the social construction of race, and our evolving relationships among people and groups.