Pluralism holds the key to the vitality of American religiousness as well as to the development of religious civility. One might think that economists long ago would have pointed this out to their colleagues in sociology who were so enamored of the strength of monopolies, since Adam Smith had laid out the whole analysis with such clarity long ago. Trouble is that until very recently, economists were so little interested in religion that the entire chapter on these matters in Smith’s classic The Wealth of Nations was (and is) omitted from most editions. It was not until I began working out the stimulating effects of pluralism on my own that someone suggested I read Smith–and I found this puzzling because initially I could find nothing on the topic in the readily available editions. Today, colleagues in economics find my emphasis on pluralism and competition fairly obvious, while many sociologists of religion continue to believe that I am obviously wrong–that competition harms religion and that I have been misled by inappropriate analogies with capitalism. Of course, the great majority of social scientists pay no attention to such peripheral matters, being secure in their knowledge that religion is doomed and soon must vanish.

Rodney Stark, The Triumph of Christianity, 2011, HarperOne, HarperCollins paperback edition 2012, page 367.

Here is an online source for Smith’s Wealth of Nations: