Das Kapital and preparatory work (especially regarding the theory of surplus value), the first volume appeared in 1867 as "The Production Process of Capital". After Marx's death in 1883, from manuscripts and the first volume Engels introduced Volume II: "The Circulation Process of Capital" in 1885; and Volume III: "The Overall Process of Capitalist Production" in 1894. These three volumes are collectively known as "Das Kapital". "Capital, Volume I" (1867) is a critical analysis of political economy, meant to reveal the contradictions of the capitalist mode of production, how it was the precursor of the socialist mode of production and of the
Influences on Karl Marx animals and tools. In a book review of the first volume of "Das Kapital", Engels wrote that Marx was "simply striving to establish the same gradual process of transformation demonstrated by Darwin in natural history as a law in the social field". In this line of thought, several authors such as William F. O'Neill, have seen that "Marx describes history as a social Darwinist 'survival of the fittest' dominated by the conflict between different social classes" and moving to a future in which social conflict will ultimately disappear in a 'classless society'" while some Marxists try to dissociate Marx from