Can a nation be collectively responsible for actions? And how should apologies and reparations be handled when the perpetrators of injustice may be dead? David Miller, author of a recent book on this topic, explores the kinds of responsibility that nations can have.

David Hume is probably the greatest English-speaking philosopher to date. In this interview for Philosophy Bites. Peter Millican, a Hume specialist, explains why his philosophy was so important.

Are men and women different by nature? And if so, what follows? Janet Radcliffe Richards, author of The Sceptical Feminist and Human Nature After Darwin, examines questions about human nature, focusing on John Stuart Mill's important book The Subjection of Women. David Edmonds is the interviewer for this episode of Philosophy Bites.

Is it immoral even to consider the use of torture in some circumstances? If the State is threatened, should we be prepared to shelve human rights for an end we consider worthwhile? Raimond Gaita discusses a range of arguments about torture in this episode of Philosophy Bites.

What is art? Can anything be a work of art? Derek Matravers, author of Art and Emotion, explores these questions in conversation with Nigel Warburton in this episode of Philosophy Bites (www.philosophybites.com).

Was Plato's ideal state a totalitarian one? Karl Popper, thought so, and made his case in The Open Society and Its Enemies. Melissa Lane, author of Plato's Progeny, reassesses Popper's critique of Plato in this episode of Philosophy Bites.

We often blame people for what they do or fail to do. But that implies that they were free to choose whether or not to act in the way they did. At the same time science seems to reveal prior causes of all our actions. There seems little or no room for free will. In this episode of Philosophy Bites Thomas Pink, author of Free Will: A Very Short Introduction, discusses the Free Will Problem and outlines his own approach to it.

Is it possible to be a citizen of the world while maintaining your own distinctive identity? Anthony Appiah defends the ethical position he dubs cosmopolitanism (which for him is universalism combined with a recognition and celebration of diversity) in conversation with Nigel Warburton in this episode of Philosophy Bites.

A.C. Grayling, author of a recent biography of René Descartes, explores Descartes' Cogito argument, the pivotal argument of the Meditations, in conversation with Nigel Warburton in this episode of Philosophy Bites.

Events happen in time. And time is essentially tensed: there is past, present, future. D.H. Mellor, author of Real Time (and Real Time 2) suggests otherwise. In this podcast for Philosophy Bites he explains why time isn't tensed.