Steve Jobs, World's Greatest Philanthropist (blogs.hbr.org)

I think similar statements could have been made about Bill Gates: we would be without microcomputing, we would be without computers in home, business would not have a computing platform to carry them for 2 decades, etc (and who is to say someone else would not have done those things?). But Bill Gates, in doing all that, also found time to give away tons of money.