Arrested development: why the world's poorest are being left behind

The first 15 years of the 21st century were a time of extraordinary progress in international development. Since 2000, a billion people have been lifted out of extreme poverty, while child mortality has halved. But most of that progress was achieved by 2015—and outcomes over the last nine years have been much more dismal. Now, it seems that the world's poorest countries are no longer converging with the richer economies. So why has development stalled? Hosts: Mike Bird, Alice Fulwood and Tom Lee-Devlin. Guests: The Economist's Cerian Richmond Jones; Mark Suzman, CEO of the Gates Foundation; Paul Collier, professor of economics and public policy at Oxford University's Blavatnik School of Government.  Transcripts of our podcasts are available via economist.com/podcasts. Listen to what matters most, from global politics and business to science and technology—subscribe to Economist Podcasts+.