"Agreed. But that could change any time, couldn't it? And I suspect it will at some point. Nature seems to have a way of periodically "clearing the deck" when a species gets totally overpopulated and out of hand. It can happen locally...and it has (like on Easter Island, for example)...but it can also happen globally."

No, not really, the herd thinning that occurs in humans is usually anti-Darwinian. War generally takes the healthiest men with the fewest genetic defects. Natural disasters like tsunamis kill randomly. I guess that drought, famine and disease to select for resilience and resistance but even there your chances of survival are way more dependent on luck and available cooperation and assistance than your genetics.

Yes society is evolving. Our genetics are not.