Jack London writing in Cosmopolitan (November, 1900):
The stronger, the braver, the more indomitable, are selected to go to the wars, and to die early, without offspring. The weaker are sent to the plow and permitted to perpetuate their kind. As Doctor Jordan has remarked, the best are sent forth, the second‑best remain. But it does not stop at this. The best of the second‑best are next sent, and the third‑best is left. The French peasant of today demonstrates what manner of man is left to the soil after one hundred years or so of military selection. Where are the soldiers of Greece, Sparta, and Rome? They lie on countless fields of battle, and with them their descendants which were not.