Selection 1: from Marx, Grundrisse (1857-58)
Malthus's theory, which incidentally not his invention, but whose fame he appropriated through the clerical fanaticism with which he propounded it -- actually only through the weight he placed on it -- is significant in two respects: (1) because he gives brutal expression to the brutal viewpoint of capital; (2) because he asserted the fact of overpopulation in all forms of society. Proved it he has not, for there is nothing more uncritical than his motley compilations from historians and travelers' descriptions. His conception is altogether false and childish (1) because he regards overpopulation as being of the same kind in all the different historic phases of economic development; does not understand their specific difference, and hence stupidly reduces these very complicated and varying relations to a single relation, two equations, in which the natural reproduction of humanity appears on the one side, and the natural reproduction of edible plants (or means of subsistence) on the other, as two natural series, the former geometric and the latter arithmetic in progression. In this way he transforms the historically distinct relations into an abstract numerical relation, which he has fished purely out of thin air, and which rests neither on natural nor on historical laws. There is allegedly a natural difference between the reproduction of mankind and e.g. grain. This baboon thereby implies that the increase of humanity is a purely natural process, which requires external restraints, checks, to prevent it from proceeding in geometrical progression. This geometrical reproduction is the natural reproduction process of mankind. He would find in history that population proceeds in very different relations, and that overpopulation is likewise a historically determined relation, in no way determined by abstract numbers or by the absolute limit of the productivity of the necessaries of life, but by limits posited rather by specific conditions of production. As well as restricted numerically. How small do the numbers which meant overpopulation for the Athenians appear to us! Secondly, restricted according to character. An overpopulation of free Athenians who become transformed into colonists is significantly different from an overpopulation of workers who become transformed into workhouse inmates. Similarly the begging overpopulation which consumes the surplus produce of a monastery is different from that which forms in a factory. It is Malthus who abstracts from these specific historic laws of the movement of population, which are indeed the history of the nature of humanity, the natural laws, but natural laws of humanity only at a specific historic development, with a development of the forces of production determined by humanity's own process of history. Malthusian man, abstracted from historically determined man, exists only in his brain; hence also the geometric method of reproduction corresponding to this natural Malthusian man. Real history thus appears to him in such a way that the reproduction of his natural humanity is not an abstraction from the historic process of real reproduction, but just the contrary, that real reproduction is an application of the Malthusian theory. Hence the inherent conditions of population as well as of overpopulation at every stage of history appear to him as a series of external checks which have prevented the population from developing in the Malthusian form. The conditions in which mankind historically produces and reproduces itself appear as barriers to the reproduction of the Malthusian natural man, who is a Malthusian creature. On the other hand, the production of the necessaries of life -- as it is checked, determined by human action -- appears as a check which it posits to itself. The ferns would cover the entire earth. Their reproduction would stop only where space for them ceased. They would obey no arithmetic proportion. It is hard to say where Malthus has discovered that the reproduction of voluntary natural products would stop for intrinsic reasons, without external checks. He transforms the immanent, historically changing limits of the human reproduction process into outer barriers; and the outer barriers to natural reproduction into immanent limits or natural laws of reproduction.
(2) He stupidly relates a specific quantity of people to a specific quantity of necessaries. [31] Ricardo immediately and correctly confronted him with the fact that the quantity of grain available is completely irrelevant to the worker if he has no employment; that it is therefore the means of employment and not of subsistence which put him into the category of surplus population. [32] But this should be conceived more generally, and relates to the social mediation as such, through which the individual gains access to the means of his reproduction and creates them; hence it relates to the conditions of production and his relation to them. There was no barrier to the reproduction of the Athenian slave other than the producible necessaries. And we never hear that there were surplus slaves in antiquity. The call for them increased, rather. There was, however, a surplus population of non-workers (in the immediate sense), who were not too many in relation to the necessaries available, but who had lost the conditions under which they could appropriate them. The invention of surplus labourers, i.e. of propertyless people who work, belongs to the period of capital. The beggars who fastened themselves to the monasteries and helped them eat up their surplus product are in the same class as the feudal retainers, and this shows that the surplus produce could not be eaten up by the small number of its owners. It is only another form of the retainers of old, or of the menial servants of today. The overpopulation e.g. among hunting peoples, which shows itself in the warfare between the tribes, proves not that the earth could not support their small numbers, but rather that the condition of their reproduction required a great amount of territory for few people. Never a relation to a non-existent absolute mass of means of subsistence, but rather relation to the conditions of reproduction, of the production of these means, including likewise the conditions of reproduction of human beings, of the total population, of relative surplus population. This surplus purely relative: in no way related to the means of subsistence as such, but rather to the mode of producing them. Hence also only a surplus at this state of development.
Selection 2: Engels, "The Attitude of the Bourgeoisie towards the Proletariat, from The Condition of the Working-Class in England (1845)
Meanwhile the most open declaration of war of the bourgeoisie upon the proletariat is Malthus Law of Population and the New Poor Law framed in accordance with it. We have already alluded several times to the theory of Malthus. We may sum up its final result in these few words, that the earth is perennially over-populated, whence poverty, misery, distress, and immorality must prevail; that it is the lot, the eternal destiny of mankind, to exist in too great numbers, and therefore in diverse classes, of which some are rich, educated, and moral, and others more or less poor, distressed, ignorant, and immoral. Hence it follows in practice, and Malthus himself drew this conclusion, that charities and poor-rates are, properly speaking, nonsense, since they serve only to maintain, and stimulate the increase of, the surplus population whose competition crushes down wages for the employed; that the employment of the poor by the Poor Law Guardians is equally unreasonable, since only a fixed quantity of the products of labour can be consumed, and for every unemployed labourer thus furnished employment, another hitherto employed must be driven into enforced idleness, whence private undertakings suffer at cost of Poor Law industry; that, in other words, the whole problem is not how to support the surplus population, but how to restrain it as far as possible. Malthus declares in plain English that the right to live, a right previously asserted in favour of every man in the world, is nonsense. He quotes the words of a poet, that the poor man comes to the feast of Nature and finds no cover laid for him, and adds that "she bids him begone", for he did not before his birth ask of society whether or not he is welcome. This is now the pet theory of all genuine English bourgeois, and very naturally, since it is the most specious excuse for them, and has, moreover, a good deal of truth in it under existing conditions. If, then, the problem is not to make the "surplus population" useful, to transform it into available population, but merely to let it starve to death in the least objectionable way and to prevent its having too many children, this, of course, is simple enough, provided the surplus population perceives its own superfluousness and takes kindly to starvation. There is, however, in spite of the violent exertions of the humane bourgeoisie, no immediate prospect of its succeeding in bringing about such a disposition among the workers. The workers have taken it into their heads that they, with their busy hands, are the necessary, and the rich capitalists, who do nothing, the surplus population.