This list is really a non-sequitur. First, I honestly can't count Ubuntu. So besides that: Gates Foundation, Startup Education, and Omidyar are essentially ch

This list is really a non-sequitur. First, I honestly can't count Ubuntu. So besides that: Gates Foundation, Startup Education, and Omidyar are essentially charity. Yeah, they are technically start ups, but... The other two's problem domains are really exceptions in the realm of "big problems": we've been doing space travel, we've been doing electric cars—these startups just do it better, but they aren't solving any new big problems. (They are solving many interesting technical problems along the way, of course.) It's also interesting that every one on that list (still discounting Ubuntu) was started with a pile of money by a previously successful entrepreneur. (And SpaceX and Tesla by the same entrepreneur, by the way.)