In Europe and beyond, populist politicians continue to gain ground. What message are voters sending? Are politicians from other parties listening, and explaining their policies in a way that will successfully reach supporters of populist parties?

There are one set of policies for which this may be a huge problem soon. What does this mean for that those tricky choices that politicians will have to make when dealing with the consequences of climate change, and sustainability?

Sergei Guriev of London Business School and Catherine de Vries of Bocconi University have both examined what is driving support for populism, and the implications of populism in politics for the social contract. They tell Tim Phillips why the planet may have a populism problem.