Racial segregation
Racial segregation has generally been outlawed worldwide. In the United States, racial segregation was mandated by law in some states (see Jim Crow laws) and enforced along with anti-miscegenation laws (prohibitions against interracial marriage), until the U.S. Supreme Court led by Chief Justice Earl Warren struck down racial segregationist laws throughout the United States. However, racial segregation may exist "de facto" through social norms, even when there is no strong individual preference for it, as suggested by Thomas Schelling's models of segregation and subsequent work. Segregation may be maintained by means ranging from discrimination in hiring and in the rental and sale of housing to certain races to vigilante violence (such as lynchings). Generally, a situation that arises when members of different races mutually prefer to associate and do business with members of their own race would usually be described as "separation" or "de facto separation" of the races rather than "segregation".