Watch US marriage equality pass the tipping point

Fifteen years ago, gay marriage was illegal everywhere in the United States. Five years ago, it was still only legal in six states. Even after the Supreme Court struck down the federal Defense of Marriage Act in 2013, saying the federal government had to recognize existing gay marriages, gay unions were legal in only a third of the states. After that, public opinion began changing more rapidly, and the pace of legalization increased. This chart shows how quickly change came: