Africa's first filmmakers boldly revealed how, and why, colonialism lived on after the independences. Sarah Jilani takes a closer look at the works of Ousmane Sembène and Souleymane Cissé. The Malian director's 1982 film Finye (the Bambara word for wind) considers students as the winds of change, whilst Sembène's Mandabi, made in 1968, takes its title from a Wolof word deriving from the French for a postal money order – le mandat postale. Adapting his own novel about the frustrations of bureaucracy, the Senegalese director made the decision to make the film in the Wolof language.

Sarah Jilani teaches at City, University of London and was chosen as a 2021 New Generation Thinker on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council which makes research into radio. You can hear her discussing another classic of African cinema on Free Thinking in this episode about Touki Bouki https://www.bbc.co.uk/programmes/m0013js4

Producer: Torquil MacLeod

In 1821, Thomas de Quincey's Confessions of an Opium Eater paved the way for drug memoirs, but how do contemporary novelists help us see the global opium trade in a different way? Fariha Shaikh's essay looks at the novel An Insular Possession published in 1986 by Timothy Mo, and at Amitav Ghosh's trilogy which began in 2008 with Sea of Poppies. She also quotes from her researches into The Calcutta Review, Fraser's Magazine for Town and Country and the book Tea and Coffee written by the campaigning vegetarian William Alcott as she make links between tea, sugar, opium, addiction and trade.

Dr Fariha Shaikh teaches in the Department of English Literature at the University of Birmingham. She is a 2021 New Generation Thinker on the scheme run by the BBC and the Arts and Humanities Research Council to turn research into radio.

Producer: Robyn Read

What made him great? Celebrated as a military leader, Alexander took over an empire created by the Persians. Julia Hartley's essay looks at two examples of myth making about Alexander: The Persian Boy, a 1972 historical novel by the English writer Mary Renault and the Shānāmeh or ‘Book of Kings’, an epic written by the medieval Persian poet Abdolghassem Ferdowsi.

Julia Hartley lectures at King's College London. She was selected in 2021 as a New Generation Thinker on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council which turns research into radio. You can hear her in this Free Thinking discussion Dante's Visions https://www.bbc.co.uk/programmes/m000zm9b and in another episode about Epic Iran, Lost Cities and Proust https://www.bbc.co.uk/programmes/m000xlzh

Producer: Torquil MacLeod

Sculptures like mouldy fruit, sea creatures that look like oil, blocks of ice carved from a melting glacier and transported to a gallery, reforesting a disused quarry: Vid Simoniti looks at different examples of environmental art and asks whether they create empathy with nature and inspire behaviour change or do we really need pictures of loft insulation and ground source heat pumps displayed on gallery walls?

Vid Simoniti lectures at the University of Liverpool. He hosted a series of podcasts Art Against the World for the Liverpool Biennial 2021. He was selected as a New Generation Thinker in 2021 on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council which turns research into radio. You can hear him taking part in this Free Thinking discussion about Who Needs Critics? https://www.bbc.co.uk/programmes/m000w5f3

Producer: Luke Mulhall

An 1856 portrait shows a 40-year-old man from Benin who managed to secure his freedom after being captured. Dasalu was taken from Dahomey to Cuba, alongside over five hundred adults and children in the ship Grey Eagle. Once in Havana, he worked for the Count of Fernandina but managed to get a letter to a missionary Charles Gollmer back in Africa. Jake Subryan Richard's essay traces the way one man’s migrations reveal the shifting boundaries of slavery and freedom.

Jake Subryan Richards teaches at the London School of Economics and was chosen as a New Generation Thinker in 2021 on the scheme run by BBC Radio 3 and the Arts and Humanities Council, which turns research into radio. You can hear him discussing his research in a Free Thinking episode called Dr Johnson's Circle https://www.bbc.co.uk/programmes/m000vq3w and in another episode looking at Ships and History https://www.bbc.co.uk/programmes/m001626t

Producer: Ruth Watts

The discovery of goffering irons, the tools used to shape ruffs, by an archaeological dig in North America, gives us clues about the way the first English settlers lived. Lauren Working's essay looks at the symbolism of the Elizabethan fashion for ruffs. Now back in fashion on zoom, they were denounced by Puritans, shown off in portraits of explorers like Raleigh and Drake, and seen by the Chesapeake as a symbol of colonisation, whilst the starch was used for porridge at a time of scarcity and war.

Lauren Working teaches at the University of York and was chosen in 2021 as a New Generation Thinker on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council which turns research into radio. You can find another Essay by Lauren called Boy with a Pearl Earring https://www.bbc.co.uk/programmes/m0014y52 and hear her in a Free Thinking discussion about The Botanical Past https://www.bbc.co.uk/programmes/m000wlgv

Producer: Luke Mulhall

Images of Cyril and Methodios adorn libraries, universities, cathedrals and passport pages in Slavonic speaking countries from Bulgaria to Russia, North Macedonia to Ukraine. But the journeys undertaken as religious envoys by these inventors of the Cyrillic alphabet have led to competing claims and political disagreements. Mirela Ivanova's essay considers the complications of basing ideas about nationhood upon medieval history.

Mirela Ivanova teaches at the University of Sheffield and was selected as a New Generation Thinker in 2021 on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council, which turns research into radio. You can hear her discussing Sofia's main museum in this episode of Free Thinking https://www.bbc.co.uk/programmes/m000wc3p

Producer: Luke Mulhall

Comrade or "marra" in north east dialect, and the "dharma" or the way - were put together in a portmanteau word by poet Bill Martin (1925-2010). Poet and New Generation Thinker Jake Morris-Campbell reflects on this idea of Marradharma and what it offers to future generations growing up in the post-Brexit and post-industrial landscape of the north east. In his essay, Jake remembers the pilgrimage he made in 2016 carrying Bill Martin's ashes in a ram's horn from Sunderland (Martin was born in a nearby pit village) to Durham Cathedral.

Jake Morris-Campbell teaches at Newcastle University and was selected as a New Generation Thinker in 2021 on the scheme run by BBC Radio 3 and the Arts and Humanities Research Council. You can find him discussing ideas about darkness in a Free Thinking discussion recorded at Sage Gateshead as part of Radio 3's After Dark festival, and looking at mining, coal and DH Lawrence https://www.bbc.co.uk/programmes/m000xmjy

Producer: Torquil MacLeod