In this substantially revised second edition, Neil MacCormick delivers a clear and current introduction to the life and works of H.L.A. Hart, noted Professor of Jurisprudence at Oxford University from 1952 to 1968. Hart established a worldwide reputation through his powerful philosophical arguments and writings in favor of liberalizing criminal law and applying humane principles to punishment. This book demonstrates that Hart also made important contributions to analytical jurisprudence, notably by clarifying many terms and concepts used in legal discourse, including the concept of law...