This ranking scheme illustrates the manner in which the barriers against desegregation fell: Of less importance was the segregation in basic public facilities, which was abolished with the Civil Rights Act of 1964.The most tenacious form of legal segregation, the banning of interracial marriage, was not fully lifted until the last anti-miscegenation laws were struck down in 1967 by the Supreme Court ruling in the landmark Loving v. Social enterprise research conducted on behalf of the Columbia Business School (2005–2007) showed that regional differences within the United States in how interracial relationships are perceived have persisted: Daters of both sexes from south of the Mason–Dixon line were found to have much stronger same-race preferences than northern daters did.
The proportion of interracial marriages is markedly different depending on the ethnicity and gender of the spouses.
Likewise, since Hispanic is not a race but an ethnicity, Hispanic marriages with non-Hispanics are not registered as interracial if both partners are of the same race (i.e.
a Black Hispanic marrying a non-Hispanic Black partner).
The differing ages of individuals, culminating in the generation divides, have traditionally played a large role in how mixed ethnic couples are perceived in American society.
Interracial marriages have typically been highlighted through two points of view in the United States: Egalitarianism and cultural conservatism.