A week ago I posted a talk by professor Hans Rosling of the Karolinska Institute in Sweden, who tragically died of pancreatic cancer earlier in 2017. Here's another talk of his from 2007 that everyone should see. The overall message is that the world has serious problems, but in many respects the world is getting better faster than you probably realize. This doesn't mean we can relax and stop worrying. It means just the opposite: That our efforts are paying off, and we need to keep it up.
For more see this previous post.