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Are humans distinguished not just by a capacity to think, but by our need to believe - where the search is not so much for my place in the world, but for our place in the cosmos? Neil MacGregor, the former Director of the British Museum, discusses Living with the Gods, his Radio 4 series, in which he focuses on the expression of shared beliefs, across thousands of years, and around the globe, through objects from the Museum's collections and beyond. The curator Jennifer Sliwka looks at a world in black and white, in a celebration of the monochrome in art across the centuries, from medieval sacred works, where the elimination of colour was thought to focus the mind, to contemporary paintings. The historian Dan Jones tells the story of the ultimate holy warriors, the Knights Templar, a story of power, politics and fanaticism. The writer Caspar Henderson takes a step back to consider the awe-inspiring - from divine visions to transcendent moments - and to ask whether we are in danger of losing our sense of wonder in the modern world. Presenter Andrew Marr Producer Katy Hickman Photograph: (c) The Trustees of the British Museum.

War became illegal in 1928 with the Paris Peace Pact that created a new world order, according to the lawyer and academic Oona Hathaway. She tells Andrew Marr how this pivotal moment launched a new international system in which sanctions replaced gunboat diplomacy. Although inter-state wars have fallen since World War Two, intra-state conflicts have risen: Elisabeth Kendall explains the dire situation of one of the Arab's poorest countries, Yemen. The Norwegian ambassador to the UK Mona Juul talks about the art of international diplomacy. She played a key role in the secret talks which led to the Oslo Accords in the 1990s - the first ever agreement between Israel and the Palestine Liberation Organisation. And Phillip Collins looks at the speeches that have shaped the world and inspired generations, especially at moments of war and conflict. Producer: Katy Hickman.

The Russian Revolution a hundred years on. To mark the centenary Tom Sutcliffe is in Moscow to discuss the forces that led to the Revolution, and to find out how far Russians today embrace or reject such a pivotal moment in their country's history. He talks to a senior member of President Putin's political party, Konstantin Kosachev. And he is joined by the journalists Mikhail Zygar and Arkady Ostrovsky and the Director of the Tretyakov Gallery, Zelfira Tregulova. Producer: Katy Hickman.