… At the time Andrew Sullivan wrote his now-famous essay in support of gay marriage in The New Republic in 1989, almost no polling firms even bothered asking questions about gay marriage. One that did — the General Social Survey — found that just 12 percent of the population was in favor of it.
But today, after a Supreme Court decision, same-sex marriage is the law of the land in all 50 states. CONT.
Nate Silver, FiveThirtyEight
Recent polls: Same-sex marriage