 The continuity of human evolution, sowing for the offspring and harvesting on the land, cleared and tilled by the ancestors, manifests itself also in the history of science and ideas. We have inherited from our forefathers not only a stock of products and of various orders of goods, which is the source of our material wealth, we have no less inherited ideas and thoughts, theories and technologies to which our thinking owes its productivity. These are the words of Ludwig von Mises.