High Quality Content by WIKIPEDIA articles! Karl Johann Rodbertus (August 12, 1805 December 6, 1875), also known as Karl Rodbertus-Jagetzow, was a German economist and socialist from Greifswald. He defended the labor theory of value (LTV) as well as the view, as an inference from that, that interest or profit is theft. 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 Holland, France, and Switzerland before returning to settle down on his newly purchased estate (Jagetzow).