> Only saving the world is a good use of your time and everything else is stupid. I roll my eyes at this sentiment, which has become an increasingly common cri

> Only saving the world is a good use of your time and everything else is stupid. I roll my eyes at this sentiment, which has become an increasingly common criticism of Silicon Valley. If Facebook improves ad targeting, and it helps millions of businesses and individuals reach potential users more effectively at a lower cost that is still good for the world, even if the effort was primarily profit-driven. Maybe we don't have to applaud it as heroism, but there's no doubt in my mind that ride sharing as a concept is a good thing for many people and a good thing for the world.