Essays on Political Economy is a classic collection book of political science essays by Frederic Bastiat. My object in this treatise is to examine into the real nature of the Interest of Capital, for the purpose of proving that it is lawful, and explaining why it should be perpetual. This may appear singular, and yet, I confess, I am more afraid of being too plain than too obscure. I am afraid I may weary the reader by a series of mere truisms.