Be wary of attempts to explain behavior via evolution. Not every trait is adaptive, so the right question is often not "What good does this do?" but "How did people survive despite this?"

Before attempting to apply such explanations, you'd need to have an extremely broad cultural perspective. Practically everybody you know is WEIRD (Western, Educated, Industrialized, Rich, and Democratic). You can't really draw a pattern without including a lot of other cultures, both existing and extinct.