Supply and demand constantly determine the prices of commodities; never balance, or only coincidentally; but the cost of production, for its part, de… - Karl Marx

To be radical is to go to the root of the matter. For man, however, the root is man himself.

Die Gesellschaft besteht nicht aus Individuen, sondern drückt die Summe der Beziehungen, Verhältnisse aus, worin diese Individuen zueinander stehn.

The first premise of all human history is, of course, the existence of living human individuals. Thus the first fact to be established is the physical organisation of these individuals and their consequent relation to the rest of nature.