"In my opinion, Walras' theory of exchange and production is not the end and aim of his study but an overture to his general equilibrium theory of capital formation and circulation. Therefore, what we have to do first of all is to elaborate in economic, rather than mathematical terms his theory of growth and money, which in Walras' work was not complete. In reconsidering Walras from such a point of view, he appears as an economist who was comparable with Marx and who anticipated Keynes."