A good reason for selfishness - Egotistic Altruism
I have been a fan of Kurzgesagt for quite a while now; I mean I still cant pronounce it but I love the work they put out.
They release animations explaining various topics and ideas that with the help of visuals actually get you to understand what they are saying. There latest piece is about the global evolution and why that's good for you.
If you are going to binge watch anything this week I highly recommend their uploads.