How has the three major race has changed over time

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 century, and only acquired its modern meaning in the field of physical anthropology from the mid 19th century. The politicization of the field under the concept of racism in the 20th century led to a decline in racial studies during the 1930s to 1980s, culminating in a poststructuralist deconstruction of race as a social construct.

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answer; adoption agencies tend to place separated twins in similar homes;