Until just yesterday, no societymonogamous or polygamoushad defined marriage as anything other than a male-female union. What Is Marriage? explains the rational basis of this historic consensus and shows why the recognition of same-sex unions as marriages is unnecessary, unreasonable, and harmful for the common good. What Is Marriage? stands poised to meet its moment as few books of this generation have. If the marriage debate in America is decided in the next few years, it will be either with this books help, or despite its powerful arguments.