Economics wealth (capital) and a constant population size. Marxist (later, Marxian) economics descends from classical economics. It derives from the work of Karl Marx. The first volume of Marx's major work, "Das Kapital", was published in German in 1867. In it, Marx focused on the labour theory of value and the theory of surplus value which, he believed, explained the exploitation of labour by capital. The labour theory of value held that the value of an exchanged commodity was determined by the labour that went into its production and the theory of surplus value demonstrated how the workers only got paid
Influences on Karl Marx was "much more important and copious than Darwin". Although there is no mention of Darwin in "The Communist Manifesto" (published eleven years prior to "The Origin of Species"), Marx includes two explicit references to Darwin and evolution in the second edition of "Das Kapital", in two footnotes where he relates Darwin's theory to his opinion about production and technology development. In the Volume I, Chapter 14: "The Detail Labourer and his implements", Section 2, Marx referred to Darwin's "Origin of Species" as an "epoch-making work" while in Chapter 15, Section I took on the comparison of organs of plants to