In _The Poverty of Philosophy_, Marx opposes Sismondi to Proudhon in sundry passages, yet about the man himself he only remarks tersely: 'Those, who, like Sismondi, wish to return to the true proportions of production, while preserving the present basis of society, are reactionary, since, to be consistent, they must also wish to bring back all the other conditions of industry of former times' (_The Poverty of Philosophy_, London, 1936, p. 57). Two short references to Sismondi are in _On the Critique of Political Economy_: once he is ranked, as the last classic of bourgeois economics in France, with Ricard in England; in another passage emphasis is laid on the fact that Sismondi, contrary to Ricardo, underlined the specifically social character of labour that creates value.--In the _Communist Manifesto_, finally, Sismondi is mentioned as the head of the petty-bourgeois school. _CHAPTER XIV_ MALTHUS At the same time as Sismondi, Malthus also waged war against some of the teachings of Ricardo. Sismondi, in the second edition of his work as well as in his polemics, repeatedly referred to Malthus as an authority on his side. Thus he formulated the common aims of his campaign against Ricardo in the _Revue Encyclopédique_: 'Mr. Malthus, on the other hand, has maintained in England, as I have tried to do on the Continent, that consumption is not the necessary consequence of production, that the needs and desires of man, though they are truly without limits, are only satisfied by consumption in so far as means of exchange go with them. We have affirmed that it is not enough to create these means of exchange, to make them circulate among those who have these desires and wants; that it can even happen frequently that the means of exchange increase in society together with a decrease in the demand for labour, or wages, so that the desires and wants of one part of the population cannot be satisfied and consumption also decreases. Finally, we have claimed that the unmistakable sign of prosperity in a society is not an increasing production of wealth, but an increasing demand for labour, or the offer of more and more wages in compensation for this labour. Messrs. Ricardo and Say, though not denying that an increasing demand for labour is a symptom of prosperity, maintained that it inevitably results from an increase of production. As for Mr. Malthus and myself, we regard these two increases as resulting from independent causes which may at times even be in opposition. According to our view, if the demand for labour has not preceded and determined production, the market will be flooded, and then new production becomes a cause of ruin, not of enjoyment.'[222]