Every aspect of modernity was shaped by individuals with intellectual roots in Vienna, argues Richard Cockett, author of "Vienna: How the City of Ideas Created the Modern World". Richard, historian and senior editor at The Economist, joins Danny Buerkli to discuss his latest book. They cover the story of the stunningly productive and creative Viennese emigrés, discuss implications for progress today and trace how the intellectual feud between Vienna and Frankfurt still reverberates today.