Addressing one of the defining social issues of our time, The Politics of Gay Marriage in Latin America explores how and why Latin America, a culturally Catholic and historically conservative region, has become a leader among nations of the Global South, and even the Global North, in the passage of gay marriage legislation. In the first comparative study of its kind, Jordi D ez explains cross-national variation in the enactment of gay marriage in three countries: Argentina, Chile, and Mexico. Based on extensive interviews in the three countries, D ez argues that three main key factors explain variation in policy outcomes across these cases: the strength of social movement networks forged by activists in favor of gay marriage; the access to policy making afforded by particular national political institutions; and the resonance of the frames used to demand the expansion of marriage rights to same-sex couples.