Why is tolerance so difficult?

[AlbertCat]

9. Steven Pinker talks about expanding circles of altruism.

It's an evolutionary thing.

We started out (waaaaaay back when) caring just about ourselves. Then about our offspring and (sometimes) our sexual partner(s). Then the circle widened to include the extended family. Then "fake" families like a tribe. Then bigger "fake" families like religions and countries. (you hear the family references in "brothers in arms" and "Pastor" or "Brethren and Sisteren&quot

This took millions of years. But now with rapid communications and the ability to go just about anywhere on the planet in a relatively short time, the circles are even now expanding to the different races and even animals.

I found his ideas all very interesting.