H L A Hart's The Concept of Law is the classic text for the study of jurisprudence and legal philosophy and is probably the most important work of legal philosophy written this century. This second edition contains an epilogue written by the author, but discovered only after his death, in which he defends his work against his critics, most notably Dworkin, Fuller, and Finnis. This then offers Hart's own final and powerful response to Dworkin in which he re-examines the foundations of the his philosophy of law and illustrates how much of the criticism of his work stems from misunderstanding and confusion of thought.