note.

The horse, the cat, the bull, nay the ass itself, have generally a higher stature, and always a more robust constitution, more vigour, more strength and courage in their forests than in our houses; they lose half these advantages by becoming domestic animals; it looks as if all our attention to treat them kindly, and to feed them well, served only to bastardize them. It is thus with man himself. In proportion as he becomes sociable and a slave to others, he becomes weak, fearful, mean-spirited, and his soft and effeminate way of living at once completes the enervation of his strength and of his courage.

Jean-Jacques Rousseau - Discourse on The Origin and The Foundation of The Inequality Among Mankind