Lots of people say that, but the fact remains that no one has ever come up with an explanation of how or why genes would code for modern personalities, or with any evidence that's inconsistent with personalities being largely cultural and changeable with skill.
Largely biological, not entirely. Your philosophy or outlook can certainly have an effect on your personality, but from what I've seen different environments and ideologies just create variations on a biological theme.
You've seen themes in people. But have you seen evidence these themes are not caused by culture? Do you have an argument that they couldn't be? That it's unlikely?
