ljlolel parent
No more reason to care for a species than for an individual sacrificing itself for the group population
Hence "depending on how broad a view of "biology" you're talking".
In any case, by "biology" you're referring to the biosphere? If so, the (potential) risk is that "biology work[ing] itself out" may involve working humans out of the picture as well.
You will die and your great great grand children, in 2100, if any, will have <10% of your dna variability
I'm not sure how that has anything to do with what I said?
In addition, there's the question of whether the variability in human DNA affects the originally described "nasty self-centered" behavior; if it doesn't, no amount of "natural" variability will achieve the described desired outcome.