Social commentators in all BBC programmes
Nobel Prize-winning chemist Sir Harry Kroto chooses the philosopher Benedict Spinoza.
Cartoonist Ralph Steadman and translator Adam Czerniawski discuss the philosopher's life.
Munira Mirza discusses the life of the influential political philosopher Hannah Arendt.
Writer Fay Weldon and biographer Vincent Brome discuss the life of the visionary novelist.
Matthew Parris and Max Mosley celebrate the life of John Stuart Mill.
Kim Henry Veltman joins director Jonathan Miller to discuss the Canadian writer on media.
Simon Evans nominates JS Mill, author of On Liberty.