I must have been doing something wrong then... Elementary school was exactly where the subtleties of human conflict first appeared to me. IMO, it's as good of a place as any to have some of your first (and due to that, perhaps the most important) encounters with what it means to exist within a society.

Reminds me of the book. "All I Really Need to Know I Learned in Kindergarten".

Early education is generally where people get most of their socialization and first learn about conflict resolution.

A good starting point though.