Sarah Montague and Michael Sandel look back at the inaugural Reith Lectures given in 1948 and 1949 by the philosopher Bertrand Russell.

In Reith Revisited, Radio 4 assesses the contributions of great minds of the past to public debate, in a dialogue across the decades with contemporary thinkers. In 1948, households across Britain gathered before the wireless as the pre-eminent public intellectual of the age, the philosopher Bertrand Russell delivered a set of lectures in honour of the BBC's founder, Lord Reith. Since then, the Reith Lectures on the Home Service and subsequently Radio 4 have become a major national occasion for intellectual debate. In this series Radio 4 revisits five of the speakers from the first ten years of the Reith Lectures.

Hilary Mantel on how fiction changes when adapted for stage or screen. Each medium, she says, draws a different potential from the original. She argues that fiction, if written well, doesn't betray history, but enhances it. When fiction is turned into theatre, or into a film or TV, the same applies - as long as we understand that adaptation is not a secondary process or a set of grudging compromises, but an act of creation in itself. And this matters. "Without art, what have you to inform you about the past?" she asks. "What lies beyond is the unedited flicker of closed-circuit TV."

The programme is recorded in Stratford-Upon-Avon in front of an audience, with a question and answer session, chaired by Sue Lawley. The producer is Jim Frank.

Hilary Mantel analyses how historical fiction can make the past come to life. She says her task is to take history out of the archive and relocate it in a body. "It's the novelist's job: to put the reader in the moment, even if the moment is 500 years ago." She takes apart the practical job of "resurrection", and the process that gets historical fiction on to the page. "The historian will always wonder why you left certain things out, while the literary critic will wonder why you left them in," she says. How then does she try and get the balance right?

The lecture is recorded in front of an audience in Exeter, near Mantel's adopted home in East Devon, followed by a question and answer session. The Reith Lectures are chaired by Sue Lawley and produced by Jim Frank.

The story of how an obsessive relationship with history killed the young Polish writer Stanislawa Przybyszewska, told by best-selling author, Hilary Mantel. The brilliant Przybyszewska wrote gargantuan plays and novels about the French Revolution, in particular about the revolutionary leader Robespierre. She lived in self-willed poverty and isolation and died unknown in 1934. But her work, so painfully achieved, did survive her. Was her sacrifice worthwhile? "She embodied the past until her body ceased to be," Dame Hilary says. "Multiple causes of death were recorded, but actually she died of Robespierre."

Over the course of these five lectures, she discusses the role that history plays in our lives. How do we view the past, she asks, and what is our relationship with the dead? The lecture is recorded before an audience in the ancient Vleeshuis in Antwerp, a city which features in Mantel's novels about Thomas Cromwell and the cosmopolitan world of the early Tudors. The lecture is followed by a question and answer session chaired by Sue Lawley.

The producer is Jim Frank.

How do we construct our pictures of the past, including both truth and myth, asks best-selling author Hilary Mantel. Where do we get our evidence? She warns of two familiar errors: either romanticising the past, or seeing it as a gory horror-show. It is tempting, but often condescending, to seek modern parallels for historical events. "Are we looking into the past, or looking into a mirror?" she asks. "Dead strangers...did not live and die so we could draw lessons from them." Above all, she says, we must all try to respect the past amid all its strangeness and complexity.

Over the course of the lecture series, Dame Hilary discusses the role that history plays in our culture. She asks how we view the past and what our relationship is with the dead.

The programme is recorded in front of an audience at Middle Temple in London, followed by a question and answer session.

The Reith Lectures are chaired by Sue Lawley and produced by Jim Frank.

Art can bring the dead back to life, argues the late novelist Hilary Mantel, starting with the story of her own great-grandmother. 'We sense the dead have a vital force still,' she says. 'They have something to tell us, something we need to understand. Using fiction and drama, we try to gain that understanding.' She describes how and why she began to write fiction about the past, and how her view of her trade has evolved. We cannot hear or see the past, she says, but 'we can listen and look'.

This was the first of a series of five lectures recorded in 2017, in which Dame Hilary discussed the role that history plays in our culture. How can we understand the past, she asks, and how can we convey its nature today? Above all, she believed, we must all try to respect the past amid all its strangeness and complexity.

This lecture is being rebroadcast as a tribute to Dame Hilary. It was recorded in front of an audience at Halle St Peter's in Manchester, followed by a question and answer session chaired by Sue Lawley.

Producer: Jim Frank

The philosopher and cultural theorist Kwame Anthony Appiah says the idea of "Western civilization" or "Western culture" is a mistaken one and that we should abandon it.

He uncovers the history of the idea from its roots at the time of the Crusades to its modern incarnation in the second half of the 20th century. However, we have very little culturally in common with our forebears in say the England of Chaucer's time. And indeed much of the knowledge supposedly at the heart of Western civilisation was actually transmitted via Islamic scholarship. No-one, he argues, can claim exclusive ownership of culture. "The values European humanists like to espouse belong just as easily to an African or an Asian who takes them up with enthusiasm as to a European," he says.

The lecture is recorded in front of an audience at New York University in Appiah's adopted home city. The series is presented and chaired by Sue Lawley

The producer is Jim Frank.

The philosopher and cultural theorist Kwame Anthony Appiah argues for a world free of racial fixations.

He tells the story of Anton Wilhelm Amo Afer. He was five years old when he was brought from the Gold Coast to Germany in 1707, educated at a royal court and became an eminent philosopher. He argues that this elaborate Enlightenment experiment illuminates a series of mistaken ideas , including that there is a "racial essence" which all members of that race carry. Modern science long ago disproved this, as almost all of the world's genetic variation is found within every so-called racial group. Instead, "race is something we make; not something that makes us."

The lecture is recorded in front of an audience at the British Council in Accra, Ghana. The series is presented and chaired by Sue Lawley

The producer is Jim Frank.

The philosopher and cultural theorist Kwame Anthony Appiah argues against a mythical, romantic view of nationhood, saying instead it should rest on a commitment to shared values.

He explores the history of the idea, born in the 19th century, that there are peoples who are bound together by an ancient common spirit and that each of these nations is entitled to its own state. He says this idea is a mistaken one, illustrating his argument through the life story of the writer who took the pen name Italo Svevo - meaning literally Italian Swabian. He was born a citizen of the Austro-Hungarian Empire and became a citizen of the new republic of Italy, all without leaving his home city of Trieste. Appiah argues that states exist as a set of shared beliefs rather than membership of some sort of mythical and ancient group. "What binds citizens together is a commitment," he says, "to sharing the life of a modern state, united by its institutions, procedures and precepts."

The lecture is recorded in front of an audience at the University of Glasgow. The series is presented and chaired by Sue Lawley. Future lectures will examine the themes of colour and culture.

The producer is Jim Frank.

Philosopher and cultural theorist Kwame Anthony Appiah argues that when considering religion we overestimate the importance of scripture and underestimate the importance of practice.

He begins with the complexities of his own background, as the son of an English Anglican mother and a Ghanaian Methodist father. He turns to the idea that religious faith is based around unchanging and unchangeable holy scriptures. He argues that over the millennia religious practice has been quite as important as religious writings. He provides examples from Jewish, Christian, Islamic and Buddhist texts to show that they are often contradictory and have been interpreted in different ways at different times, for example on the position of women and men in Islam. He argues that fundamentalists are a particularly extreme example of this mistaken scriptural determinism.

The lecture is recorded in front of audience at the London School of Economics and Political Science. The series is presented and chaired by Sue Lawley. Future lectures will examine identity in the contexts of country, colour and culture.

The producer is Jim Frank.