I’ll take a different approach here. Evolution does not care about your feelings.

If a species is unwilling to self-sacrifice for the greater good, and it comes up against an event that cannot be solved with selfishness, it goes extinct. Like in this scenario.

But evolution is a motherfucker, and evolution does not care about your feelings, the only thing that matters to evolution is reproductive success. So some people are going to be altruistic because that’s better for the species because it makes it more survivable.

I’m not saying it’s right, I’m not saying it’s wrong, but the species that’s going to survive is the one that’s willing to self sacrifice for the greater good of the species. To increase reproductive success. And that’s what’s going to be left in the universe. Because evolution does not care. You either get with the program or you get out of the gene pool no other option