This remarkable collection contains some of the very best work on themes developed by Hans Kelsen, regarded by many as the most influential legal philosopher of the twentieth century. The volume addresses in rich detail the topic where debate on Kelsen's work has been liveliest: 'normativity' as Kelsen's alternative to both traditional legal positivism and natural law theory.

The book boasts a truly international list of contributors, with authors from Europe, North and South America, and Australia - a dozen countries in all.