Yeah I agree with this. I thought I read that scientists claim there's no such thing as "group selection" in evolution, i.e. where one individual in a group will do something bad for himself but good for the group (reproductively speaking).

Yeah it looks like wikipedia has a page on this controversy:

https://en.wikipedia.org/wiki/Group_selection

Richard Dawkins apparently doesn't believe in it, and neither does Steven Pinker.

But just based on casual observation I think group selection is real (yes I know that's not scientific). Humans are like ants in many ways... some of us are "programmed" to perform specific roles.

In the case of dromomania's "patient zero", his wanderlust appears to have resulted from traumatic brain injury. I don't think this squares with your theory.