This week we talk to former Foreign Secretary David Miliband about his new book Rescue: Refugees and the Political Crisis of our Time. He explains what the refugee crisis tells us about the state of world politics and why it is both so essential and so hard to tackle it. We also talk about climate change, Brexit, the failures of the Blair government and the fate of social democracy in the new 'age of extremes'. David Miliband is currently Chair and CEO of the International Rescue Committee (IRC).