What is Hunter-Gather Theory? And what it had to do with Autism or ADHD?

I heard that scientist link conditions like Autism (i had only Autism/Asperger) or ADHD with Hunter-Gather and Neanderthals, that both condition had advantage in early days of civilization?
Answers

Anonymous

Well you heard wrong. Hunter-gatherer isn't a theory, it's a type of society.

Enguerarrard

This was speculation more than a theory, as there was no way to test it. Men tend to scan the environment while women tend to focus on details; that's a general gender difference and may be rooted in hunting.