Focusing in detail on the particular theory of natural law developed by John Finnis and Germain Grisez, this is an introductory account of the theory for those who are new to the field. It then broadens, assesses and advances the debate surrounding it, examining crucial philosophical, theological and ethical issues and opening up discussion beyond the confines of the Roman Catholic Church. Part One, on philosophical issues, opens with two broad chapters that locate Finnis/Grisez in relation to modern moral philosophy tradition and the Roman Catholic tradition of Thomism, and then follows with...