This startlingly original (and sure to be controversial) account of the evolution of Christianity shows that the economics of religion has little to do with counting the money in the collection basket and much to do with understanding the background of today's religious and political divisions. Since religion is a set of organized beliefs, and a church is an organized body of worshippers, it's natural to use a science that seeks to explain the behavior of organizations—economics—to understand the development of organized religion. The Marketplace of Christianity applies the tools of economic theory to illuminate the emergence of Protestantism in the sixteenth century and to examine contemporary religion-influenced issues, including evolution and gay marriage.