To what extent have the Millennium Development Goals helped to eradicate global poverty and improved things for the world's poorest? As the MDGs come to the end of their life, the author of the Millennium Development Goals defends his ambition and the strategies employed to meet the goals; with Mark (Lord) Malloch-Brown, Mark Suzman of the Gates Foundation, and Yasmini Aiya of the Centre for Policy Studies in Delhi Photo: Children collect pieces of coal along the roadside in Bujumbura, Burundi (Credit: Spencer Platt/Getty Images)