The System of Pragmatic Idealism is of special importance for Nicholas Rescher's philosophical work, because here he has presented the systematic approach at once. Dedicated to his 70th birthday a group of European and U.S-american philosophers discuss the main topics of Rescher's philosophical system. The contributions which are presented here for the first time and Nicholas Rescher's responses cover the most important topics of philosophy and give a deep and detailed insight into the strenght of Rescher's pragmatic idealism. This volume is of interest for philosophers studying Rescher's philosophy and for all those who are interested in systematic philosophy and the vividnes of pragmatism and idealism in present philosophy.