The institution of marriage stands at a critical juncture. As gay marriage equality gains acceptance in law and public opinion, questions abound regarding marriage’s future. Will same-sex marriage lead to more radical marriage reform? Should it? Antonin Scalia and many others on the right warn of a slippery slope from same-sex marriage toward polygamy, adult incest, and the dissolution of marriage as we know it. Equally, many academics, activists, and intellectuals on the left contend that there is no place for monogamous marriage as a special status defined by law. Just Married demonstrates that both sides are wrong: the same principles of democratic justice that demand marriage equality for same-sex couples also lend support to monogamous marriage.