I want to draw particular attention to the underlying notion of “self-interest.”56 It is in a real sense the key to the new philosophy. The term first appears in English right around Hobbes’ time, and it is, indeed, directly borrowed from interesse, the Roman law term for interest payments. When it was first introduced, most English authors seemed to view the idea that all human life can be explained as the pursuit of self-interest as a cynical, foreign, Machiavellian idea, one that sat uncomfortably with traditional English mores. By the eighteenth century, most in educated society accepted
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