The concept of race as a rough division of anatomically modern humans (Homo sapiens) has a long and complicated history. The word race itself is modern and was used in the sense of "nation, ethnic group" during the 16th to 19th centuries and acquired its modern meaning in the field of physical anthropology only from the mid-19th century. Several social and political developments that occurred at the end of the 19th century and into the 20th...