The French philosopher Michel Foucault though friendship could be one of the most subversive relationships around. Our friends can be the most important people in our lives. But managing friendships can be hard work too. Matthew Sweet is joined by a psychotherapist, a historian, a philosopher, a literary historian, and a film critic to discuss the history, politics, and psychology of friendship.

Tiffany Watt Smith is the author of Bad Friend: A Century of Revolutionary Friendships

Producer: Luke Mulhall

Shahidha Bari looks at censorship, editing and self-censorship with guests including historian of China, Rana Mitter, Jemimah Steinfeld of Index on Censorship and Nigel Warburton, host of the Philosophy Bites podcast. Amelia Fairney discusses her research on sensitivity readers and the conversations that take place in publishing houses. And, Nicola Wilson, who’s been studying reading recommendations from The Book Society which operated in the UK between 1929 and 1968. The book selectors sometimes suggested changes to the published texts so we hear about this history and look at publishing now.

Nicola Wilson's book Recommended! The influencers who changed how we read is out now

Producer: Ruth Watts

Anne McElvoy and guests explore the intersections between Christian faith and political decision-making and look at some recent dramas which explore the impact of belief.

Chine McDonald is director of the Christian Think Tank Theos, Mark Lawson is a writer, broadcaster and theatre critic of Catholic journal The Tablet, Prof Anna Rowlands is St Hilda Professor of Catholic Social Thought & Practice at the University of Durham, Dafydd Mills Daniel is a Lecturer in Divinity at the University of St Andrews and Sam Tanenhaus, has published a biography of influential American conservative thinker and Catholic, William F Buckley Jnr. called Buckley: The Life and the Revolution That Changed America.

Producer: Debbie Kilbride

Journalists Peter Hitchens and Oliver Kamm, radio presenter and comedian Ellis James, languages expert Ross Perlin, Diana Sutton director of The Bell Foundation and podcaster and academic Reetika Revathy Subramanian join Matthew Sweet for a conversation about how language unites and divides us.

Ross Perlin's book Language City: The Fight to Preserve Endangered Mother Tongues was the winner of the British Academy Book prize and he is in London for the British Academy Summer showcase.

Producer: Debbie Kilbride

"Ever tried. Ever failed. No matter. Try again. Fail again. Fail better." The words of Samuel Beckett from a 1983 short story Worstward Ho inspire a Free Thinking conversation about failure chaired by Matthew Sweet. His guests are:

Producer: Luke Mulhall

Personal Identity is at the heart of contemporary culture. Political philosophies are built around it and family history is a hobby undertaken by hundreds of thousands. Understanding where you came from is seen as central to understanding who you are. But what if the things that are uncovered are uncomfortable, upsetting or even life-changing?

Matthew Sweet is joined at the Hay Festival by three writers who have hosted podcasts which raise these questions – Joe Dunthorne, whose memoir Children of Radium and BBC Radio 4 series Half Life explore his great-grandfather's work with chemical weapons; Kavita Puri, whose series Three Million told the story of the Bengal Famine, and of British culpability in it; and Jenny Kleeman, whose BBC Radio 4 podcast The Gift tells the stories of lives upended by DNA testing kits. How does the format of the podcast help them explore these complicated subjects?

The Gift, Three Million and The History Podcast, Half Life are all available now on BBC Sounds

Producer: Luke Mulhall

What do we mean by 'common sense'?

Producer: Luke Mulhall

Political power can take many forms, from the top-down model of the Roman Empire, to operating in the democratic politics of today, to the possibilities offered by new technologies for more horizontal power structures in the future.

Matthew Sweet is joined on a stage at the Hay Festival by historian Tom Holland, whose new translation of Suetonius’ Lives of the Caesars examines Roman power politics from the inside; Guto Harri, who saw the inside workings of power as Downing Street Director of Communications; Adam Greenfield, whose book Lifehouse looks at local networks of mutual aid that have emerged in response to climate crisis; and political philosopher Sophie Scott-Brown - whose book The Radical Fifties: Activist Politics in Cold War Britain is out in July.

Producer: Luke Mulhall

Wolves were once hunted and persecuted to the point of near extinction but are now enjoying a come back across Europe, if not the UK. What can explain the way they've been targeted, and even demonised, given the low risk they pose to human beings? Shahidha Bari talks to Adam Weymouth, author of Lone Wolf, which describes his journey tracking a wolf called Slavc across the Alps, folklore experts Zoe Gilbert and Daisy Black, the environmentalist, Ben Goldsmith and Brian Zimmerman, the Director of Conservation and Science at Bristol Zoological Society. Are we seeing a change in wolves' troubled fortunes in the context of debates about rewilding?

Producer: Jayne Egerton

What is the role of vision in politics? Must politicians have a vision of what kind of society they’re working towards, ultimately? What kind of role does this vision play in the day-to-day practice of working politicians? Or is this a misunderstanding of the nature of politics?

Producer: Luke Mulhall