The Germans T. Adorno and G. Habermas extended the earlier positivist philosophy to cope with priority of personal perspective. Among many Americans who created the modern landscape of relativism one, Nelson Goodman, has focused on the way that the personal perspective can determine the nature of rightness and understanding. Such constructions are entirely imbedded in the worldview of individuals, and the ideas are connected directly to the values they hold which are, in turn, directly derived from social experience. P. Feyerabend has shown that no large-scale mental construction is possible; all proposed theories are merely lists of priorities derived directly from local experience.