During the past three decades, nations all over the world have been debating whether to allow same-sex couples to marry, or at least grant these couples various rights associated with marriage. In Equality for Same-Sex Couples, Yuval Merin presents the first comparative study of the legal regulation of same-sex partnerships worldwide, as well as a unique survey of the status of same-sex couples in Europe. Merin begins by providing a historical overview of the transformation of marriage from antiquity to the present. He then identifies and critically compares four principal models for the legal regulation and recognition of same-sex partnerships: civil marriage, registered partnership, domestic partnership, and cohabitation. Merin concludes that all of the models except civil marriage discriminate against gays and lesbians just as the "e;separate but equal"e; doctrine discriminated against African Americans; thus, so-called alternatives to marriage, even if they provide the same rights and benefits as marriage, are inherently unequal and therefore unconstitutional.