Andrew Marr looks at what happens when political power fractures and how 'soft power' retains its influence. Peter Pomerantsev spent a decade working in Russia's fast-growing television industry and tells the story of a country changing from communism and nascent democracy to a mafia-state and oligarchy. The political analyst Joseph Nye coined the phrase 'soft power' in 1990 and in his latest essay argues that while America's economy may have been overtaken by China, the US century is far from over. Impressionist art continues to grow in popularity and price-tag, and the curator Anne Robbins looks back on the life of Paul Durand-Ruel, the 19th century art dealer and visionary who foresaw its power and marketability worldwide. Producer: Katy Hickman.