> get adopted are simply sets and heuristics which make the group benefit the most from "just how it is." "Group" is a slippery thing, though. There is always

> get adopted are simply sets and heuristics which make the group benefit the most from "just how it is." "Group" is a slippery thing, though. There is always a tendency for individuals and sub-groups to cheat on whatever wider group ethics might exist. It's a more complex phenomena than most people give it credit for.