...In the civil rights era, the Supreme Court waited decades to weigh in on interracial marriage. On Friday, by contrast, the court did not hesitate to jump into the middle of one of the most important social controversies of the day, agreeing to hear two cases on same-sex marriage....

In private correspondence in 1957, Justice Felix Frankfurter said the court was doing all it could to avoid hearing cases that would require giving the nation an answer about whether bans on interracial marriage — anti-miscegenation laws, in the parlance of the day — were constitutional....

The Supreme Court did not strike down laws banning interracial marriage until 1967, in Loving v. Virginia, when 16 states still had them on the books. That was almost two decades after the California Supreme Court in 1948 struck down a law making illegal “all marriages of white persons with Negroes” in Perez v. Sharp....