Ronald Myles Dworkin was an American legal philosopher, jurist, and scholar of United States constitutional law. At the time of his death, he was Frank Henry Sommer Professor of Law and Philosophy at New York University and Professor of Jurisprudence at University College London. Dworkin had taught previously at Yale Law School and the University of Oxford, where he was the Professor of Jurisprudence, successor to philosopher H. L. A. Hart.

Herbert Lionel Adolphus Hart was an English legal philosopher. He was the Professor of Jurisprudence at Oxford University and the Principal of Brasenose College, Oxford. His most famous work is The Concept of Law, which has been hailed as "the most important work of legal philosophy written in the twentieth century". He is considered one of the world's foremost legal philosophers in the twentieth century.