The point though is that making ourselves dumber by making our skulls thicker so we can survive car crashes is a bad choice. We want to be getting smarter, not

The point though is that making ourselves dumber by making our skulls thicker so we can survive car crashes is a bad choice. We want to be getting smarter, not dumber, right now. Our instincts tend to align with that goal (including protecting the weak) when they are pro-social since that’s how we’ve been evolving lately.