For the first time, a majority of Americans are living in states that allow gay marriage. After a year of cascading court opinions tossing out many remaining restrictions, the dynamic in 2014 changed from how many states allow same-sex marriage to how many states don't.
At year's end, gay marriage is legally approved in 35 states and the District of Columbia, and court reviews are pending in many others.
The federal government took action as well, with Attorney General Eric H. Holder extending federal recognition to same-sex marriages in many states and announcing that same-sex spouses cannot be compelled to testify against each other and should be eligible to file jointly for bankruptcy, among other guarantees.
"2014 is the year that it became unquestionable that all of America will have the freedom to marry," said Evan Wolfson, founder and president of the advocacy group Freedom to Marry. "The only question is whether 2015 will be the year that it gets done."
For opponents, however, the battle is not over and they are looking to the U.S. Supreme Court in the coming year to make a final determination.
Four federal appellate circuits have backed same-sex marriage, but one has rejected it: the Sixth Circuit, which oversees Ohio, Michigan, Kentucky, and Tennessee. Cases are pending in at least four other appeals circuits, and more are expected.
"It appears now, with the Sixth Circuit, the Supreme Court will take up one of these cases and decide whether to affirm states' rights to define marriage between a man and a woman," said Jim Campbell, a senior attorney for the Alliance Defending Freedom, which opposes same-sex marriage. "The courts are working through the question."
The Supreme Court had a chance to take a case that would have allowed it to rule on the issue, but decided in October to give it a pass, possibly because no appeals court had yet opposed gay marriage and there were no conflicts to resolve in the lower courts.
Parties in five states have sought permission to argue the issue before the Supreme Court. The first inkling could come Jan. 9 when the court holds a conference on which cases it will take. If the court elects to hear the same-sex marriage issue in the spring, a decision could come by June.
The legal march really started in 2013. On June 26 of that year, the Supreme Court struck down portions of the Defense of Marriage Act, a landmark ruling that extended federal benefits to gays and lesbians. The Supreme Court, however, stopped short of ruling that same-sex marriage was a constitutionally protected right, leaving the door open to the legal debate that has been unfolding in 2014.
In its broadest formulation, the issue pits states' rights to decide what constitutes marriage against individuals' rights to be treated the same regardless of sexual preferences. This was especially touchy since some of those marriage definitions involve state constitutional amendments approved by voters. Even in cases in which marriage restrictions were decided by election, courts are being asked to decide whether the majority can impose such rules on minorities.