Link to the Show / Show NotesIsaiah Berlin was born in Russia a hundred years ago, on 6 June 1909. He grew up to be a distinguished philosopher, a great historian of ideas - tracing the origins and vicissitudes of liberal thought over the last few centuries - and an eloquent defender of liberty. He was a man with very many friends and, this week, we talk about him with one of them: the British political philosopher John Gray.

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