194: Evo psych of punishment & revenge, Fairness in male/female dynamics & more

In today's show we discuss the Evolutionary psychology of individual, group, and self punishment and revenge. How does this factor in to Hamilton's rule? 

Listener questions:

1. Why do people seek revenge and compensation pain from a person who has angered them even if they lose as well? Why do people take an approach of 'I will hurt you back even if it means I get hurt as well' when they are in rage?

2. Are there evolutionary reasons for sending signals to the others by physically harming oneself?

3. Kind of a weird question but why is it so hard to convey to guys/male partners that they should simply put down the toilet seat after they are done peeing?  I find this conversation extremely unnecessary and childish however it seems to me that there is something deeper behind (evolutionary) otherwise it doesn’t make sense to me to make such a big fuss about it. I know it sounds dumb but thanks for answering!

4.  What is it about human social psychology that make Stone age tribes or "villages" tend to Max out around 50 or 150 people or so? Was it that nothing could invite more people than that under any common purpose?.