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Society is at a turning point, warns Professor Shoshana Zuboff. Democracy and liberty are under threat as capitalism and the digital revolution combine forces. She tells Andrew Marr how new technologies are not only mining our minds for data, but radically changing them in the process. As Facebook celebrates its 15th birthday she examines what happens when a few companies have unprecedented power and little democratic oversight. Although behavioural data is constantly being abstracted by tech companies, John Thornhill, Innovations Editor at the Financial Times, questions whether they have yet worked out how to use it effectively to manipulate people. And he argues that the technological revolution has brought many innovations which have benefitted society.The award-winning writer Ece Temelkuran has warned readers about rising authoritarianism in her native Turkey. In her new book, How To Lose a Country, she widens that warning to the rest of the world. She argues that right-wing populism and nationalism do not appear already fully-formed in government - but creep insidiously in the shadows, unchallenged and underestimated until too late.Producer: Katy Hickman

There is nothing new for chemistry to discover, says Bernie Bulkin. In Solving Chemistry: A Scientist's Journey, the former Head of Science at BP argues that an unprecedented event has happened: a branch of science has made all the major discoveries it is likely to make. He tells Tom Sutcliffe what this means for chemistry - and for science more broadly.Medicine is in the midst of 'a biomedical revolution' says Professor Sir Robert Lechler. His own field of kidney transplants has been transformed by our new understanding of the immune system. He has helped to curate Spare Parts, an exhibition at the Science Gallery that poses the question: how many transplants could we have before we were no longer ourselves?Elizabeth Pisani has watched interest in different diseases rise and fall. As an epidemiologist she charts the impact that press attention and public grants have on medical research, with some becoming fashionable while in others treatments lag behind. And she warns that scientists too often fail to take account of the human context when delivering medicines. Astrophysicist Jo Dunkley assesses our understanding of the universe in a concise new guide. But the universe is 85% dark matter - and we still know very little about this. She draws attention to the brilliant female scientists who contributed to breakthroughs in physics, but whose contributions have been forgotten along the way.Picture: Big Heart Data by Gareth McKee, part of Spare Parts at the Science GalleryProducer: Hannah Sander

Andrew Marr on beauty and politics in art. Our idea of beauty was shaped by the great Victorian art critic John Ruskin. He thought all people deserved to see beauty every day, and compared, and founded a gallery in Sheffield for local industrial workers. To mark Ruskin's bicentenary, curator Louise Pullen has put together a new exhibition showing how his ideas about art, science, truth and beauty shaped the politics of the day."All art is propaganda and ever must be, despite the wailing of the purists," declared WEB Du Bois. The civil rights campaigner, philosopher and social thinker argued that it was an artist's duty to shape a better world. Academic Liam Bright explains why Du Bois thought both artists and scientists had a duty to tell the truth.In poet Fiona Benson's new volume Vertigo and Ghost, beauty, violence and power are never far apart. Benson's poems depict Zeus as a serial rapist, and capture the claustrophobia of modern domestic life.And design guru Stephen Bayley considers what creativity is - and what it is for - in his new book How To Steal Fire. As a leading cultural critic, he asks what place beauty and imagination have in modern life.Producer: Hannah Sander