In early January, the Supreme Court put same-sex marriages on hold in Utah, at least while a federal appeals court more fully considers the issue. More than 900 gay and lesbian couples have married in Utah since US District Judge Robert Shelby ruled that the state's ban on same-sex marriage violates gay and lesbian couples’ constitutional rights. That state is one of 29 with constitutional bans on same-sex marriage.
In the early 1970s, there were zero states banning or allowing same-sex marriage, and no states offered civil unions or domestic partnerships. How it happened: