It may just be that this group of people isn't up to the challenge and, like you said, natural selection is necessary to produce a group that is up to the challenge.
Unfortunately that selection may come too late and much of the ecosystem may suffer for it.
I'm saying that objectively maybe we should all die.
From a subjective perspective I'm going to keep fighting to the detriment of all the others around to the very bitter end and take down as many of them as I can, just like the real enemy of life that I am.
It may just be that this group of people isn't up to the challenge and, like you said, natural selection is necessary to produce a group that is up to the challenge.
Unfortunately that selection may come too late and much of the ecosystem may suffer for it.