Sir Isaiah Berlin (1909–1997) was a Russian-British social and political theorist, philosopher and historian of ideas. Although averse to writing, his improvised lectures and talks were recorded and transcribed, with his spoken word being converted by his secretaries into his published essays and books.
Born in Riga, Latvia, in 1909, he moved to Petrograd, Russia, at the age of six, where he witnessed the revolutions of 1917. In 1921 his family moved to the UK, and he was educated at St Paul's School, London, and Corpus Christi College, Oxford. In 1932, at the age of 23, Berlin was elected to a prize fellowship at All Souls College, Oxford. He translated works by Ivan Turgenev from Russian into English and, during the war, worked for the British Diplomatic Service. From 1957 to 1967 he was Chichele Professor of Social and Political Theory at the University of Oxford. He was president of the Aristotelian Society from 1963 to 1964. In 1966, he played a role in founding Wolfson College, Oxford, and became its first President. Berlin was appointed a CBE in 1946, knighted in 1957, and appointed to the Order of Merit in 1971. He was President of the British Academy from 1974 to 1978. He also received the 1979 Jerusalem Prize for his writings on individual freedom, and on November 25th, 1994, he received the honorary degree of Doctor of Laws at the University of Toronto, for which occasion he prepared a "short credo" (as he called it in a letter to a friend) known as "A Message to the 21st Century", to be read on his behalf at the ceremony.
An annual Isaiah Berlin Lecture is held at the Hampstead Synagogue, at Wolfson College, Oxford, at the British Academy, and in Riga. Berlin's work on liberal theory and on value pluralism, as well as his opposition to Marxism and communism, has had a lasting influence. In its obituary of the scholar, The Independent stated that:

Isaiah Berlin was often described, especially in his old age, by means of superlatives: the world's greatest talker, the century's most inspired reader, one of the finest minds of our time ... there is no doubt that he showed in more than one direction the unexpectedly large possibilities open to us at the top end of the range of human potential