It is tricky to pin down economic revolutions, because one major innovation begets others.

I'll take the controversial position that Bitcoin is not the economic revolution, but rather an outcome of the Information Revolution.

As revolutionary as money is, I think it followed naturally from settling into agrarian societies. If you aren't moving to where there are resources you need resources to move to you. Money emerges from barter.

I think of there being three revolutions, but of course it's open to debate: