We will only select from this Decalogue of Collectivist Anarchism one dogma, the seventh; because it contains a fundamental error of Proudhon's, which must continually produce other errors. "Products," he says, "are only exchanged for products; but since every bargain presupposes the equality of products, profit is impossible and not right." By this proposition the question of pauperism and everything evil is to be solved, and, in fact, Proudhon even made some attempts to realise the theory contained therein. But that every bargain presupposes the equality of products in any other than the sense determined by supply and demand, is untrue; yet even this equality is not regarded by Proudhon as such. He understands thereby equivalence or the equality of values, which again is determined by the time of labour, and accordingly he makes it a presupposition of a free bargain that only products which represent equal times of labour can be exchanged. Thus a hat which took six hours to make, should be exchanged for a poem which was written in the same time. And if we are startled by the incorrectness of this assumption, what can be said for the converse of this statement, namely, that products of equal value, _i. e._, such as represent equal times of labour, must be accepted at any time in place of payment, just as money is accepted to-day? Proudhon ascribed the utility of money as a universal medium of exchange to the supposed circumstance that its value was fixed or established, and concluded therefrom that whenever the value of other commodities was determined, they would have the same utility as money; thus, that it would be possible to exchange at any time a watch which represented three days' work for a pair of boots which had been made in the same time. And to complete this economic and logical confusion, Proudhon once again inverts history, and makes the just and free exchange of products and the circulation of values the starting-point for the determination of values, and thereby also the foundation of his realm of justice, freedom, and equality, in which economic forces have free play.