Left behind places can be found in prosperous countries from South Yorkshire, integral to the industrial revolution and now England's poorest county, to Barranquilla, once Colombia's portal to the Caribbean and now struggling. More alarmingly, the poorest countries in the world are diverging further from the rest of humanity than they were at the start of this century. Why have these places fallen behind? And what can we do about it?
World-renowned development economist Paul Collier has spent his life w
