This is the first book to consider German sociologist Niklas Luhmann's social theory in a critical legal context. His theory is introduced here both in terms of society at large and the legal system specifically, and the book reveals the aporetic structure of autopoiesis, aligning it with postmodern approaches to law. Readers will find it operates both as an introduction to the relevance of Luhmann's social theory for law, as well as a critical response to autopoiesis.