But this oscillation, clearly pointed out by the economists, is but the effect of a contradiction which, repeating itself on a vast scale, engenders the most unexpected phenomena. Three years of fertility, in certain provinces of Russia, are a public calamity, just as, in our vineyards, three years of abundance are a calamity to the wine-grower I know well that the economists attribute this distress to a lack of markets; wherefore this question of markets is an important one with them. Unfortunately the theory of markets, like that of emigration with which they attempted to meet Malthus, is a begging of the question. The States having the largest market are as subject to over-production as the most isolated countries: where are high and low prices better known than in the stock-exchanges of Paris and London? From the oscillation of value and the irregular effects resulting therefrom the socialists and economists, each in their own way, have reasoned to opposite, but equally false, conclusions: the former have made it a text for the slander of political economy and its exclusion from social science; the latter, for the denial of all possibility of reconciliation, and the affirmation of the incommensurability of values, and consequently the inequality of fortunes, as an absolute law of commerce. I say that both parties are equally in error. 1. The contradictory idea of value, so clearly exhibited by the inevitable distinction between useful value and value in exchange does not arise from a false mental perception, or from a vicious terminology, or from any practical error; it lies deep in the nature of things, and forces itself upon the mind as a general form of thought,--that is, as a category. Now, as the idea of value is the point of departure of political economy, it follows that all the elements of the science--I use the word science in anticipation--are contradictory in themselves and opposed to each other: so truly is this the case that on every question the economist finds himself continually placed between an affirmation and a negation alike irrefutable. ANTINOMY, in fine, to use a word sanctioned by modern philosophy, is the essential characteristic of political economy; that is to say, it is at once its death-sentence and its justification.