Confusion has reigned at Twitter since Elon Musk took the reins of the company, and one of the most pressing questions has to do with whether or not the social media platform will be reshaped to fit its new CEO's ideal of unfettered free speech. Musk has referred to Twitter as the "digital town square" – but how can the town square also be a private estate, owned by a billionaire? This week we're talking property, ownership... and how it all connects with Jane Austen's Pride and Prejudice.

What does it mean to study and teach philosophy in prison? Andy West has been teaching philosophy in prisons since 2015, and his memoir The Life Inside is a fascinating account of this experience - as well as a reflection on inherited trauma and the fact that his father, uncle and brother all spent time behind bars.

Like death, causation is something of a riddle. The death certificate of Queen Elizabeth II has "old age" given as the cause of death - but given that old age is simply an outcome of being alive for a certain period of time, what does it mean to pathologise it in this way, and to list it as a fatal condition? Far from being an exact science, death certification is rife with interpretation and contentious decision-making - and this reflects not only death's enigmatic qualities, but the mysterious nature of causation itself.

Günther Anders is the most interesting and important philosopher you've probably never heard of. An exile from Nazi Germany who landed in America in the late 1930s, Anders was a prescient theorist of media and technology whose insights are remarkably pertinent to today's digital landscape. His major work is a best-seller in Europe and he's one of Germany's most well-regarded intellectuals, yet he's almost unknown in the Anglosphere. Why haven't we heard more about him?

Insect farming, we're told by its proponents, is the next big thing in edible protein production, and it may just save the world. But an insect "farm" is more like a manufacturing plant where the tiny organisms are pulped into powder form.

What is the moral status of these living things? Can we be sure they're not sentient beings, capable of experiencing pain and suffering? And if we can't be sure, how should we treat them?This program was first broadcast on August 22, 2021.

Modern travel is a commodity: you buy a holiday. But have you ever thought of travel as a philosophical activity? Offering the discovery of new traditions, new perspectives and the acquisition of knowledge, travel should make philosophers of us all. The 19th century was an era in which travel was thought of in this way, and women were out there at the frontiers of discovery. But their independence and daring came at a potentially high cost.

Refugees have been with us for millennia, but the modern refugee exists under a distinctively modern set of circumstances. Moral philosophers often fail to take these circumstances into account, and to acknowledge the ways in which the West can be responsible for refugee crises.

Friedrich Nietzsche is popularly regarded as one of the gloomier thinkers, so people are often surprised to learn that he can be very funny. But the humour in his writing is doing serious work: Nietzsche is looking for a way to find joy in the darkest corners of life - and to do it without falling back on what he sees as false Christian comfort.

How do we know the things we know? The fact is that most of our knowledge comes down to trust - particularly trust in institutions and experts. But in a world where misinformation has become a lucrative industry, how is it possible to trust wisely?

Can a religion be non-theistic, with no God or deity at the centre? It's a question that has exercised philosophers of religion for a long time – but members of The Satanic Temple, which was founded in the USA in 2013, would emphatically say yes. This week's guest expounds some Satanic philosophy, and has a fascinating backstory of his own.