Start here: https://en.wikipedia.org/wiki/The_Evolution_of_Cooperation https://en.wikipedia.org/wiki/The_Evolution_of_Cooperation Though you don't actually ha

Start here: https://en.wikipedia.org/wiki/The_Evolution_of_Cooperation https://en.wikipedia.org/wiki/The_Evolution_of_Cooperation Though you don't actually have to get too deep into the weeds to answer that question: what you should do is whatever maximizes your odds of achieving your goals. The harder question is: what goals should you choose?