Every week in Wales, people stand up on stage and talk. They talk about their lives, their communities, their passions. Behind each talk is an idea. In this series, presenter Catrin Nye brings us some of the best of these, and interviews the speakers to explore the central idea behind their stories, how their experiences have shaped them, and how they hope their talk will help to shape us.

In this episode, mathematician Marcus du Sautoy, technology journalist David Rowan and social activist Amanda Blainey offer three perspectives on how the world works now and where we might be heading.

The Idea is a Bengo Media production for BBC Radio Wales Show less