This collection of the writings of Paul Feyerabend is focused on his philosophy of quantum physics, the hotbed of the key issues of his most debated ideas. Written between 1948 and 1970, these writings come from his first and most productive period. These early works are important for two main reasons. First, they document Feyerabend's deep concern with the philosophical implications of quantum physics and its interpretations. These ideas were paid less attention in the following two decades. Second, the writings provide the crucial background for Feyerabend's critiques of Karl Popper and Thomas Kuhn. Although rarely considered by scholars, Feyerabend's early work culminated in the first version of Against Method. These writings guided him on all the key issues of his most well-known and debated theses, such as the incommensurability thesis, the principles of proliferation and tenacity, and his particular version of relativism, and more specifically on quantum mechanics.

Over the past thirty years Paul Feyerabend has developed an extremely distinctive and influentical approach to problems in the philosophy of science. The most important and seminal of his published essays are collected here in two volumes, with new introductions to provide an overview and historical perspective on the discussions of each part. Volume 1 presents papers on the interpretation of scientific theories, together with papers applying the views developed to particular problems in philosophy and physics. The essays in volume 2 examine the origin and history of an abstract rationalism, as well as its consequences for the philosophy of science and methods of scientific research. Professor Feyerabend argues with great force and imagination for a comprehensive and opportunistic pluralism. In doing so he draws on extensive knowledge of scientific history and practice, and he is alert always to the wider philosophical, practical and political implications of conflicting views. These two volumes fully display the variety of his ideas, and confirm the originality and significance of his work.

Over the past thirty years Paul Feyerabend has developed an extremely distinctive and influentical approach to problems in the philosophy of science. The most important and seminal of his published essays are collected here in two volumes, with new introductions to provide an overview and historical perspective on the discussions of each part. Volume 1 presents papers on the interpretation of scientific theories, together with papers applying the views developed to particular problems in philosophy and physics. The essays in volume 2 examine the origin and history of an abstract rationalism, as well as its consequences for the philosophy of science and methods of scientific research. Professor Feyerabend argues with great force and imagination for a comprehensive and opportunistic pluralism. In doing so he draws on extensive knowledge of scientific history and practice, and he is alert always to the wider philosophical, practical and political implications of conflicting views. These two volumes fully display the variety of his ideas, and confirm the originality and significance of his work.

Die Aufsiitze des vorliegenden Bandes wurden zwischen 1950 und 1980 ge- schrieben. 2/15- ist der friiheste Aufsatz. Ich schrieb ihn 1950/52, teils in Wien, nach Diskussionen mit Elizabeth Anscombe, die mir die damals noch ungedruck- ten Wittgensteinschen Schriften zeigte, teils in London, als Stipendiat des British Council. Wittgenstein macht es klar, daB eine Praxis wie die Praxis des Denkensl Handelns/Redens/Planemachens in einer bestimmten Kultur sich durch abstrakte Begriffe und Beschreibungen weder darstellen, noch lenken laBt, und zwar vor allem darum, weil jede Regel, die man zu soleh auBerer Umformung einsetzen mochte, nur dann sinnvoll wird, wenn man sie eng mit der Praxis verbindet und dadurch einer Erfassung durch einfache und klar aufgebaute Begriffe und MaB- stabe entzieht: ist ein MaBstab wirksam, dann ist sein Inhalt viel komplizierter als seine Formulierung vermuten laBt. LaBt sich umgekehrt sein Inhalt mit Hilfe ein- facher Schlagworte erfassen, dann wird eine interessante Praxis von ihm kaum auf fruchtbare Weise gefordert werden, und das selbst dann nicht, wenn sich die ver- wendeten Schlagworte mit anderen Schlagworten zu einem schonen philosophi- schen System zusammenfiigen (man vergleiche etwa Brechts Praxis der Theater- arbeit und seine, Theorie' der Verfremdung). 1m Falle der Wissenschaften bedeu- tet das, daB methodologische Oberlegungen nur im Zusammenhang mit konkreten Problemen sinnvoll sind: die Methodologie ist ein komplizierter Teil der wissen- schaftlichen Praxis, nicht ein tiber ihr stehender Richter. Mehr verschroben ausge- driickt: fruchtbare Methodologie ist forschungsimmanent, nicht forschungstrans- zendent.