Some Marxists posit what they deem to be Karl Marx's theory of human nature, which they accord an important place in his critique of capitalism, his conception of communism, and his 'materialist conception of history'. Marx, however, does not refer to human nature as such, but to Gattungswesen, which is generally translated as 'species-being' or 'species-essence'. According to a note from Marx in the Manuscripts of 1844, the term is derived from Ludwig Feuerbach's philosophy, in which it refers both to the nature of each human and of humanity as a whole. However, in the sixth Theses on Feuerbach (1845), Marx criticizes the traditional conception of human nature as a species which incarnates itself in each individual, instead arguing that human nature is formed by the totality of social relations. Thus, the whole of human nature is not understood, as in classical idealist philosophy, as permanent and universal: the species-being is always determined in a specific social and historical formation, with some aspects being biological. According to David Ruccio, a transhistorical concept of "human nature" would be eschewed by Marx who wouldn't accept any transhistorical or transcultural "human nature." much in the same way as in Marxian critique of political economy. The sixth thesis on Feuerbach and the determination of human nature by social relations The sixth of the Theses on Feuerbach, written in 1845, provided an early discussion by Marx of the concept of human nature. It states: Feuerbach resolves the essence of religion into the essence of man [menschliches Wesen = 'human nature']. But the essence of man is no abstraction inherent in each single individual. In reality, it is the ensemble of the social relations. Feuerbach, who does not enter upon a criticism of this real essence is hence obliged: 1. To abstract from the historical process and to define the religious sentiment regarded by itself, and to presuppose an abstract — isolated - human individual. 2. The essence therefore can by him only be regarded as 'species', as an inner 'dumb' generality which unites many individuals only in a natural way. Thus, Marx appears to say that human nature is no more than what is made by the "social relations". Norman Geras's Marx and Human Nature (1983), however, offers an argument against this position. In outline, Geras shows that, while the social relations are held to "determine" the nature of people, they are not the only