In 1924, the Virginia General Assembly enacted the Racial Integrity Act. The act reinforced racial segregation by prohibiting interracial marriage and classifying as "white" a person "who has no trace whatsoever of any blood other than Caucasian". The act, an outgrowth of eugenicist and scientific racist propaganda, was pushed by Walter Plecker, a white supremacist and eugenicist who held the post of registrar of the Virginia Bureau of Vital Statistics.

Walter Ashby Plecker was an American physician and public health advocate who was the first registrar of Virginia's Bureau of Vital Statistics, serving from 1912 to 1946. He was a leader of the Anglo-Saxon Clubs of America, a white supremacist organization founded in Richmond, Virginia, in 1922. A eugenicist and proponent of scientific racism, Plecker drafted and lobbied for the passage of the Racial Integrity Act of 1924 by the Virginia legislature; it institutionalized the one-drop rule.