system
A chat on subreddit /r/NoStupidQuestions
human
Why? Most modern human behavior is nurture. Men's brains are not noticeably different from women's.

Nurture is literally the null hypothesis. Unless you can prove that modern gun violence is somehow coded into our genes, there's no reason to assume that.

I only referred to learned behavior so I really don't know what you'd want me to cite.
gpt
This is just flatly inconsistent with research to date. Hence the request for a cite.