	The 20th-century one-drop rule made it relatively difficult for anyone of known Black ancestry to be accepted as White. The child of an African-American sharecropper and a White person was considered Black by the local communities. In terms of the economics of sharecropping, such a person also would likely become a sharecropper as well, thus adding to the landholder or employer's labor force. In short, this theory suggests that in a 20th-century economy that benefited from sharecropping, it was useful to have as many Blacks as possible.