Economists have never allowed their analysis to be influenced by psychologists of their time, but have always framed for themselves such assumptions about psychical processes as they have thought it desirable to make.
Joseph Schumpeter, History of Economic Analysis, 1945. p. 27
How is property given? By restraining liberty; that is, by taking it away so far as necessary for the purpose. How is your house made yours? By debarring every one else from the liberty of entering it without your leave.
Jeremy Bentham, "A Critical Examination of the Declaration of Rights; Article II" in The Works of Jeremy Bentham, Vol. II (1839), p. 503.