This book brings together the fruits of different traditions in legal philosophy and draws on them to develop a systematic thesis on the concept of law. The work uses a legal model to explore the underlying question of how the current phenomena of transnational law are best understood, in combination with an examination of the traditions of JÃ1/4rgen Habermas's critical theory and H.L.A. Hart's analytic jurisprudence. This leads the author to conclude that the key to a fruitful dialogue and comprehensive understanding is to appreciate that the concept of law is not state-cantered and must reflect relationships to other legal systems.