This book presents the papers and comments on those papers delivered at a colloquium held at the Australian National University in December 2008 to celebrate 50 years since the publication in the Harvard Law Review of the famous and wide-ranging debate between HLA Hart and Lon L Fuller. These essays do not to re-run that debate and they are not confined to discussion of the jurisprudential issues canvassed by Hart and Fuller. Rather they pick up on strands in the debate and re-think them in the light of social, political and intellectual developments in the past 50 years and changed ways of understanding law and other normative systems. This collection looks forward rather than backward using the debate as a point of departure and inspiration.

... the ideal entrance point into the famous debate between H.L.A. Hart and L. Fuller. The aim of Cane's edited collection is twofold: the chapters grapple with the debate on its own terms, while extracting lessons for the modern world. The book is remarkably successful at both tasks This book promises to be a source of questions for the curious minds of all philosophical persuasions. Margaret Martin Ethics July 2012

Peter Cane is Professor and Director of the John Fleming Centre for Advancement of Legal Research at the Australian National University.