Paul Hoyningen-Huene

The present volume aims at giving a discussion ot the problems ot reductionism in contemporary life sciences. It contains six papers which deals with reduction/reductionism in different fields ot biological research. Also, the holistic perspective, 1. e. the systems view, is discussed in some ot the papers. The message ot this discussion Is that - whereas reductionism is indeed an important strategy - the systems approach is needed. It is argued by some ot the authors that organisms are complex systems and not just heaps of molecules, 50 that the analytical method does not suffice. Recent developments in systems theory offer the possibility to install a more comprehensive view ot living systems what can be seen particularly in the field ot evolutionary biology. It is true that any organismic activity is molecular, this is to say that it is based on molecular mechanisms. But it is also true that the whole organism displays certain patterns ot behavior which are not just molecular. Any organism can be described as a system ot different levels ot organization different levels ot order and complexity - and it is important, theretore, to study all ot the organizational levels and to see their peculiarities. It should be obvious, however, that there is not one problem ot reduction/reductionism, but that there are many problems linked together and that these problems appear at different levels ot biological research and bio philosophical reflections.

Die im Aufsatz vorgetragene Kritik am Leitmotiv von Georg Pichts Vorlesung "Der Begriff der Natur und seine Geschichte" kann wie folgt zusammengefaßt werden:1. Das für die Natur bedrohliche Handeln ist nicht primär als angewandte Naturwissenschaft, sondern als technisches Handeln zu bestimmen.2. Die Zerstörung von Natur ist nicht Ausdruck einer Wesensqualität von Wissenschaft, sondern allenfalls eine Nebenfolge ihrer Anwendung, primär aber eine Nebenfolge des technischen Handelns.3. Wissenschaftliches Wissen erfaßt tatsächlich die Natur nicht so, wie sie von sich her ist, aber die zerstörerische Anwendung von Wissenschaft ist kein Indiz für diesen Sachverhalt.4. Bei der Anwendung von Wissenschaft überblickt niemand die Gesamtheit der Handlungsfolgen, aber das liegt nicht spezifisch an den Charakteristika der Wissenschaft, sondern an der conditio humana.5. Die Mahnung, heute die Wahrheit unserer Naturerkenntnis in Frage zu stellen, erübrigt sich, da diese Diskussion längst im Gange ist

The paper deals with the interrelations between the philosophy, sociology and historiography of science in Thomas Kuhn’s theory of scientific development. First, the historiography of science provides the basis for both the philosophy and sociology of science in the sense that the fundamental questions of both disciplines depend on the principles of the form of historiography employed. Second, the fusion of the sociology and philosophy of science, as advocated by Kuhn, is discussed. This fusion consists essentially in a replacement of methodological rules by cognitive values that influence the decisions of scientific communities. As a consequence, the question of the rationality of theory choice arises, both with respect to the actual decisions and to the possible justification of cognitive values and their change.