Kalecki's most famous contribution is his profit equation. Kalecki, whose early influences came from Marxian economists, thought that the volume of profits and their sharing in a capitalist society were vital points to be treated. This followed from Karl Marx's work on relationships such as the rate of surplus value or the organic composition of capital (and even a forecast about the overall trend of profits). However, Marx was not able to make a meaningful statement about the total volume of profits in a given period.