"But the instinct of hoarding, like all other instincts, tends to become hypertrophied and perverted; and with the institution of private property comes another institution-that of plunder and brigandage. In private life, no motive of action is at present so powerful and so persistent as acquisitiveness, which unlike most other desires, knows no satiety. The average man is rich enough when he has a little more than he has got, and not till then."