In the global marketplace of ideas, few realms spark as much conflict as religion. For millions of people, it is an integral part of everyday life, reflected by a widely divergent supply of practices and philosophical perspectives. Yet, historically, the marketplace has not always been...

This paper suggests that, while medieval cathedrals served many purposes and, indeed, were some of the greatest technical achievements of their time, they served a rational economic purpose as well. Protestant entry into the market for Christian religion finally materialized in the early...