Niklas Luhmann ranks as one of the most important sociologists and social theorists of the twentieth century. Through his many books he developed a highly original form of systems theory that has been hugely influential in a wide variety of disciplines.

Translators Note and Acknowledgements System-Autopoiesis-Form: An Introduction to Luhmann's 'Introduction to Systems Theory' Editor's Preface to the German Edition I. Sociology and Systems Theory   1. The Functionalism of System Maintenance   2. Parsons II. General Systems Theory   1. The Theory of Open Systems   2. System as Difference (Formal Analysis)   3. Operational Closure   4. Self-Organization, Autopoiesis   5. Structural Coupling   6. Observing   7. Re-entry   8. Complexity   9. The Idea of Rationality III. Time IV. Meaning V. Psychic and Social Systems   1. Problems of "Action Theory"   2. Two Modes of Operation of Autopoiesis VI. Communication as a Self-Observing Operation VII. Double Contingency, Structure, Conflict Suggested Further Readings

Niklas Luhmann (1927-1998) ranks as one of the most important sociologists and social theorists of the 20th century. From 1968 to 1992 he taught at the University of Bielefeld as a professor of sociology. In recent years, Luhmann's systems theory has gained resonance in a wide variety of disciplines. Introduction to Systems Theory is Luhmann at the height of his powers. He offers precise conceptual analyses and a wealth of examples to clarify the theoretical foundations of general and sociological systems theory. This book is a rich source of ideas that can be applied to a variety of complex questions. It offers a wide range of concepts and theorems that pertain equally to politics and the economy, religion and science, art and education, the family and personal life. Moreover, Luhmann's ideas address important contemporary issues in such diverse fields as cognitive science, ecology, and the study of social movements. Luhmann's Introduction to Systems Theory provides all the necessary resources for students to work through the foundations of systems theory. Along the way, it also shows that it may well be among the most important resources of serious theoretical work in the social sciences today. This is the most accessible of Luhmann's books and it will establish itself as the key text for anyone who wishes to understand systems theory and its uses today.

'These lectures, published here in English for the first time, show Luhmann at the height of his powers. They offer a unique insight into the engine room of arguably the world's most famous systems theorist. It is indeed a brilliant mind that is at work here; very few other social scientists would be able to perform at such a level. Particularly for students and readers who are not familiar with Luhmann's style of thought, this is an ideal introduction to systems theory by the man himself.' Andreas Hess, University College Dublin 'Niklas Luhmann is the closest the social sciences have come, in a long time, to an actual thinker. This book is an indispensable introduction to Luhmann’s unique version of systems theory and required reading to all concerned about theoretical sociology. It offers a rare glimpse into the experimental workings of an extraordinary sociological mind at work.' Stephan Fuchs, University of Virginia