Jews and Christians see mankind inherently corrupt; a non-believer may say that the imperative for self-preservation conflicts with the social imperative. They are saying the same thing; as a species,
man is out for number one; all others are tied for last. Were that not so, man might be sleeping with the dinosaurs by now. But even here, TANSTAAFL applies; there still Ain’t No Such Thing As A Free Lunch. Our species gains from this attitude but it also pays a price.