And because I live in San Francisco, I have a special message for my techies out there: I urge you to put your energy towards innovating on real world challenges. I cringe every time I hear the common saying in tech that people want to work on “hard problems”. But how about “meaningful hard problems with impact on the social and physical world”? Those are the hardest but most rewarding problems to solve of all. Derek Thompson’s piece, “The Rea…