Thinking more like the creatures we are, rather than the 'Perfectly Ethical' machines we're not, can seriously facilitate seemingly difficult decision making in my opinion.
Whilst I’m sure you’re not saying we should start peeing up lampposts or living in trees I think there is a large difference between us and (non-human) animals which is due largely to our thought processes. I for one wouldn’t want to live in a savage world where everyone is out for themselves with no thought for anyone else (I’ll ignore the fact that some may say that’s where we are anyway).
Other animals form partnerships within their groups for mating and any attempt by another male/female to interject is often met with aggression by the mate/whole group.
As humans I feel the way we’ve evolved has let us see consequences more fully. Not just spreading our DNA but trying to improve the survival of that DNA by helping each other to become more co-operative.
Well that, read back, sounded like a pretentious load of twaddle so for that I apologise.
Nick