Morals - all correct moral laws - derive from the instinct to survive. Moral behavior is survival behavior above the individual level.
Robert A. HeinleinWe each have a moral obligation to conserve and preserve beauty in this world; there is none to waste.
Robert A. HeinleinAll societies are based on rules to protect pregnant women and young children. All else is surplusage, excrescence, adornment, luxury, or folly which can - and must - be 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 endlessly - and no doubt will keep trying.
Robert A. Heinlein