Note 34 — CRIMINALITY.
Henry P. (Henry Pomeroy) Horton translation
When we study the social species of animals we notice that the life in common is in general one of their most powerful weapons in the struggle for existence, a weapon without which it would be nearly or quite impossible for them to maintain the fight. Consequently the animals for which the life in common is advantageous and which possess social instincts stronger than others, have, when brought together by any cause whatever, a greater chance to survive.34 Per contra the animals who have to stalk their prey have more chance of surviving when life in common is disagreeable to them. It is therefore by survival that social feelings are developed in some species of animals and not in others.35 Habit, and the tendency to imitate increase these feelings considerably.