Isaiah Berlin (1909–1997) was a political philosopher and historian of ideas. Born in Riga, he moved in 1917 with his family to Petrograd, where he witnessed the Russian Revolution. In 1921 he emigrated to England. He was educated at Corpus Christi College, Oxford, and became a Fellow of All Souls College, Oxford, where he was later appointed Professor of Social and Political Theory. He served as the first president of Wolfson College, Oxford, and as president of the British Academy.