The Supreme Court's same-sex marriage battle, explained

The U.S. Supreme Court on Friday struck down bans against same-sex marriage as unconstitutional, legalizing the practice nationwide.

In a 5-4 opinion, the high court ruled that states must recognize marriages between two people of the same sex. States must also recognize gay marriages licensed in other states.

How did we get here? Here’s an explainer from Vox.com: