"No longer may this liberty be denied", with those words, Justice Anthony Kennedy wrote the majority opinion that rewrote American civil rights law. On June 26, 2015, the U.S. Supreme Court handed down its 5, 4 decision in *Obergefell v. Hodges*, ruling that state bans on same-sex marriage violated the Fourteenth Amendment's guarantees of due process and equal protection. The case took its name from Jim Obergefell, an Ohio man who sued after his home state refused to list him as the surviving spouse on his husband's death certificate. Kennedy's majority opinion held that marriage represents one of the most fundamental liberties a person holds, and that denying it on the basis of sex could no longer stand. The ruling invalidated laws in the 13 states that still banned same-sex marriage and compelled every state to recognize existing same-sex unions. Nearly a decade later, *Obergefell* remains the legal cornerstone of marriage equality and a defining test of how the Court interprets constitutional liberty.