[bluGill]

I don't have 10,000 years, the species probably does.

Evolution doesn't care. There are also reasons to not protect the weak. Either way it changes the future of the species. On one hand we don't protect the weak, and thus the strong survive; on the other hand we protect the weak, the species doesn't get as strong, but we can encourage some other trait(s).

Note, strong species might be a stronger skull, better reactions, or something else that I can't even think of. I don't know how to force any choice.

[ironmagma]

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.