Ronald Myles Dworkin, FBA (; December 11, 1931 – February 14, 2013) was a Jewish-American philosopher and scholar of United States constitutional law and jurisprudence. 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, and had taught previously at Yale Law School and the University of Oxford, where he was the Professor of Jurisprudence, successor to Herbert Lionel Hart. An influential contributor to both philosophy of law  and political philosophy, Dworkin received the 2007 Holberg International Memorial Prize in the Humanities for "his pioneering scholarly work" of "worldwide impact." According to a survey in The Journal of Legal Studies, Dworkin was the second most-cited American legal scholar of the twentieth century. After his death, the Harvard legal scholar Cass Sunstein said Dworkin was "one of the most important legal philosophers of the last 100 years. He may well head the list."