Johann Karl Rodbertus (August 12, 1805, Greifswald, Swedish Pomerania – December 6, 1875, Jagetzow), also known as Karl Rodbertus-Jagetzow, was a German economist and socialist and a leading member of the Linkes Zentrum (centre-left) in the Prussian national assembly. He defended the labor theory of value as well as the view, as an inference from that, that interest or profit is theft. He believed that capitalist economies tend toward overproduction. Biography Rodbertus was also known as "Rodbertus-Jagetzow" from the name of the estate of Jagetzow, in Pomerania, which he bought in 1835. Rodbertus was the son of a professor of law, and himself studied law at Göttingen and Berlin. From these studies he went on to Heidelberg, where he took up philosophy. He travelled extensively in the Netherlands, France, and Switzerland before returning to settle down on his newly purchased estate (Jagetzow). He served from 1827 to 1832 in the Prussian justiciary. By 1837, he had formulated his social platform, and in that year published Die Forderungen der arbeitenden Klassen. Elected to the National Assembly in 1848, he was Minister of Education in the Auerswald-Hansemann ministry for a fortnight, and in 1849 was a leader of the centre-left. After the defeat of the 1848 Revolution, Rodbertus did not participate in politics and the last twenty years of his life were spent in retirement. Theories Socialism, as defined by Rodbertus, was to be a gradual evolution, hence his acquiescence in a monarchy, and his break with the Democrats as a political party. He regarded the social question as a purely economic one. His principal doctrines are these: The workman's share of the nation's industrial income tends constantly to decline; land rent and interest are the result of the exploitation of the working classes; the present shares in the distribution of wealth (rent, profits, interest, and wages) are not entirely the result of permanent, universal economic forces, but the result of historical evolution and the prevailing legal system; financial and commercial crises are due to a non-adjustment of production and consumption; the laborer's purchasing power is small and the capitalist and landlord classes, instead of increasing their consumption of luxuries, invest their savings in new factories, and in otherwise increasing the means of production, with the inevitable result that commodities of common consumption are produced in excess. Rodbertus stated the Labor Theory of Value as three connected propositions. First, only those goods