Sir Isaiah Berlin

Sir Isaiah Berlin, OM (6 June 1909 - 5 November 1997) was a philosopher and historian of ideas, regarded as one of the leading liberal thinkers of the twentieth century. He excelled as an essayist, lecturer and conversationalist; and as a brilliant speaker who delivered, rapidly and spontaneously, richly allusive and coherently structured material, whether for a lecture series at Oxford University or as a broadcaster on the BBC Third Programme, usually without a script. Many of his essays and lectures were later collected in book form