To quote Robert Heinlein:
All societies are based on rules to protect pregnant women and young children. All else is surplusage, excrescence, adornment, luxury, or folly, which canand mustbe dumped in emergency to preserve this prime function. As racial survival is the only universal morality, no other basic is possible. Attempts to formulate a "perfect society" on any foundation other than "Women and children first!" is not only witless, it is automatically genocidal. Nevertheless, starry-eyed idealists (all of them male) have tried endlesslyand no doubt will keep on trying.
Ahhhh, Heinlein was good, before he became obsessed with breakfast and incest (in no particular order).