Book excerpt: Marriage, Law and Modernity offers a global perspective on the modern history of marriage. Widespread recent debate has focused on the changing nature of families, characterized by both the rise of unmarried cohabitation and the legalization of same-sex marriage. However, historical understanding of these developments remains limited. How has marriage come to be the target of national legislation? Are recent policies on same-sex marriage part of a broader transformation? And, has marriage come to be similar across the globe despite claims about national, cultural and religious difference? This collection brings together scholars from across the world in order to offer a global perspective on the history of marriage. It unites legal, political and social history, and seeks to draw out commonalities and differences by exploring connections through empire, international law and international migration.