| Why don't the stay-at-homes simply outbreed the do-gooders and thus bury the altruistic impulse along with the casualties of combat? |
| If the key to economic progress in the past was the survival of the richest, what is in store now that the richest no longer outbreed everyone else? |
| Both Lamarckians and Weismannists admit that the better adapted to its surroundings a living form may be, the more likely it is to outbreed its compeers. |
| But outbreed too far and other difficulties arise as genetic incompatibilities between the parents make reproduction harder. |
| Showy peacocks attract more predators, but they outbreed drabber rivals just because peahens adore flashy tails. |
| As a result, the sicklier agriculturists were able to outbreed the more robust hunter-gatherers. |
