Contact

Humankind A Hopeful History by Rutger Bregman is powerful and gives a comprehensive look at the history of humanity. It crosses paths with Yuval Noah Harari's book Sapiens.

There is one chapter — "The Best Remedy For Hate, Injustice and Prejudice" — that is excellent on presenting the best remedy for these humanity issues, and the remedy is "CONTACT." Here is an excerpt (page 358) from that chapter: 

"Contact engenders more trust, more solidarity and more mutual kindness. It helps you see the world through other people's eyes. Moreover, it changes you as a person, because individuals with a diverse group of friends are more tolerant towards strangers. And contact is contagious: when you see a neighbor getting along with others, it makes you rethink your own biases."