Max Weber. You can read more about him in the link provided at the bottom of this question.

I'm not sure about all his views but he's famous for a book called The Protestant Work Ethic and the Spirit of Capitalism where he analyzes Protestant values and how they were a driving force behind capitalism.

There is a famous book by Max Weber called The Protestant Ethic and the Spirit of Capitalism. His thesis is that Protestantism created the values that developed capitalism.

Jonathan James Thomas Reilly has written:

'The capitalist ethic and the spirit of Puritanism' -- subject(s): Capitalism, Christian ethics, Protestant churches, Religious aspects, Religious aspects of Capitalism