The most characteristic quality of that work, and the one in which it most differs from some others which have equalled and even surpassed it as mere expositions of the general principles of the subject, is that it invariably associates the principles with their applications. This of itself implies a much wider range of ideas and of topics, than are included in Political Economy, considered as a branch of abstract speculation. For practical purposes, Political Economy is inseparably intertwined with many other branches of social philosophy. Except on matters of mere detail, there are perhaps no practical questions, even among those which approach nearest to the character of purely economical questions, which admit of being decided on economical premises alone. And it is because Adam Smith never loses sight of this truth; because, in his applications of Political Economy, he perpetually appeals to other and often far larger considerations than pure Political Economy affords—that he gives that well-grounded feeling of command over the principles of the subject for purposes of practice, owing to which the "Wealth of Nations," alone among treatises on Political Economy, has not only been popular with general readers, but has impressed itself strongly on the minds of men of the world and of legislators.
It appears to the present writer, that a work similar in its object and general conception to that of Adam
