Has marriage "been understood to be, always and exclusively, between a man and a woman"--as the Church of England and many other religious and political institutions claim? Or is this claim contestable? Debates about marriage have a direct influence on people's everyday lives, and it is a fundamental matter of equality and human rights. Yet the debates about same-sex marriage in the UK and the US are taking place in an informational vacuum too often filled by emotion and rhetoric. Legally Married looks at the claims made on both sides of the debate, placing them in their historical context,...