"When you tell people the world is improving, they often look at you like you're either naive or crazy. But it's true. And once you understand it, you start to see the world differently. If you think things are getting better, then you want to know what’s working so you can accelerate the progress and spread it to more people and places. It doesn’t mean you ignore the serious problems we face. It just means you believe they can be solved, and you’re moved to act on that belief. This is the core of my worldview."

--Bill Gates 
https://www.good.is/articles/bill-gates-class-of-2017-essay