The folks at Vox have put together this: 26 charts and maps that show the world is getting much, much better.
One of my favourite statistics/charts is this one:
Even hardcore pessimists have a difficult time with that one. 🙂
The other 25 charts are worth checking out. They highlight significant areas where life is getting better. If you need a reason to be optimistic or to be more optimistic (or to be less pessimistic), you owe it to yourself to see the Vox post and then think about it.