"The poem in itself was not much more than a clever jeu d'esprit, but the Remarks and the Inquiry into the Origin of Moral Virtue, which he published in defence of his thesis, are among the acutest psychological tracts of the age... The passions which produce the effect of virtue are those that spring from pride and the sense of power and the desire of luxury... Such a theory of the passions is a legitimate, if onesided, deduction from the naturalistic philosophy as it left the hands of Locke; the ethical conclusions, it will be observed, have a curious similarity with the later system of Nietzsche. The theory of Mandeville was too violently in opposition to the common sense of mankind to produce much direct influence, but it remained as a great scandal of letters."