I'm surprised they completely failed to mention http://en.wikipedia.org/wiki/The_Protestant_Ethic_and_the_Spirit_of_Capitalism http://en.wikipedia.org/wiki/The_

I'm surprised they completely failed to mention http://en.wikipedia.org/wiki/The_Protestant_Ethic_and_the_Spirit_of_Capitalism http://en.wikipedia.org/wiki/The_Protestant_Ethic_and_the_Sp... which is probably the classical text on the matter (and they appear to reinvent quite a lot of the same theories)