Following up on the previous post.
If we all lived in a simple village with Neanderthals, we could count on their canny instincts to warn many years in advance of a change in average temperatures. You'd have no trouble getting a consensus around a campfire we would store up more food in the summer and prepare better dwellings to weather what would be worse winters than we were previously accustomed to. When the really bad climate hit, chances are we would be overprepared to a ridiculous degree and would probably be ready to move permanently into a much better insulated cavern with piles of wood a couple stories high to heat it for many years in advance.
There'd be no detractors. We would not have to spend hours around the campfire trying to talk Ur-Gore out of his delusions that the weather would be getting warmer. Chances are if Ur-Gore persisted in his shrieking about the uncontrollable warming approaching, the women would have a quick pow-wow one night before bed. They'd point to Ur-Gore and draw their fingers across their throats. This is the group wisdom of women. They'd peg Ur-Gore as a defective male endangering the entire tribe with his insanity. The next morning, Ur-Gore would yawn and stretch before opening his eyes and realizing he was surrounded by elders. They'd give Ur-Gore a couple strips of beef-jerky and a walking stick and send him away, warning him to never return. It would be the last time anyone would ever see Ur-Gore alive. Problem solved. It also means that a male with psychopathic tendencies would not have better breeding success than those without psychopathy.
In the Saps tribe, just because people are insane doesn't mean they aren't still in charge. You have to do what they say. They cannot be overruled by reasonable arguments when Homo Sapiens is incapable of reasoning. Rational thinking is completely useless inside of tribes like these and that is why a tribe with leadership like this is completely useless inside a new Ice Age. It is a dysgenic death anchor that kills everybody inside it stupid enough to cooporate.