The Bell Curve controversially asserts that this factor influences intelligence.
A 1920 book about the "Rising Tide" of this concept, written by Lothrop Stoddard, followed up an essay by Arthur de Gobineau which explains how it leads to inequality. John Howard Griffin got exiled to Mexico for writing a memoir about this property. This concept, language, and culture, title a Franz (*) Boas essay collection. The Bell Curve controversially asserts that this factor influences intelligence. Anti-miscegenation laws prevent marriage based on differences in it. In US v. Armstrong, the Supreme Court upheld some profiling based on this factor. For 10 points, name this concept, examples of which include Caucasian and African-American.
A 1920 book about the "Rising Tide" of this concept, written by Lothrop Stoddard, followed up an essay by Arthur de Gobineau which explains how it leads to inequality.
race [or racism; or word forms; or skin color; prompt on ethnicity; technically race and skin color are not the same thing, but the distinction here is unclear in a few clues, so accept either]