"Though licentious and in many respects objectionable, there are a great number of valuable remarks and of just and profound observations in this work [The Fable of the Bees], especially with reference to the improvement of arts and the increase of wealth. Mandeville, indeed, by way of establishing his leading doctrine, that "private vices are public benefits," has represented sundry passions and desires as vicious which do not deserve any such character. Thus, the desire to rise in the world, to enjoy an increased command over necessaries and luxuries, and to attain to distinction, is said by him to be a vice: but it would be more correct to call it a cardinal virtue. So long as it is pursued by fair and proper means, and without injury or prejudice to the rights and interests of others, it is worthy of every commendation; and is, in fact, the prolific source of wealth, science, and civilization. Luxury and ostentation is also one of the vices on which Mandeville lays the greatest stress, as contributing to national opulence. But luxury is a most ambiguous term, and it is very difficult to say when it is or is not censurable... But however incorrect his classification of virtues and vices, and however lax his morality, his book contains a great many paragraphs that strikingly illustrate the progress of society, and may, therefore, be advantageously referred to by the political economist."