Built: reddit, hipmunk, breadpig
Wrote: 2 books
Invested: in dozens of companies
Advised: hundreds of founders as a partner in YC
Alexis is an investor in 42Floors. Easily one of the nicest, most supportive, most helpful investors/peers/role models I've ever come across. And yes, he's an activist! So he self-promotes. Explicitly for the cause of an open internet. And I'm so incredibly grateful that he promotes a cause I care so much about, but over which I have so little influence.