H. L. A. Hart

"Ronald Dworkin... argues that our law includes not only norms found in treaties, customs, constitutions, statutes, and cases, but also moral principles that provide the best justification for the norms found there.5 On his account, the things justified by moral."

"The year in Oxford was the philosophically most important for Rawls since 1941–42 (his first year as a philosophy student, under the influence of Malcolm). Through Urmson, he got to know Oxford’s most important philosophers. He attended a lecture course by H. L. A. Hart, who, freshly promoted to a professorship, was expounding some of the ideas he would later publish in The Concept of Law. Rawls was especially impressed with a seminar taught by Berlin and Hampshire, with Hart’s active participation, in the winter of 1953. This covered Condorcet, Rousseau’s Social Contract, John Stuart Mill’s "On Liberty," Alexander Herzen, G. E. Moore, and two essays by John Maynard Keynes. Rawls continued to think of this seminar as an exemplar of excellent teaching that he should seek to emulate."