Over recent decades, the richer world has poured money towards poorer countries, in the form of aid and loans for development over many decades. But is this top-down solution really effective? Anthropologist Henrietta Moore argues that the age of development is over, and that we need to move to new ideas about how to improve human lives. Professor Moore, who heads the Institute for Global Prosperity at University College London, says that the fatal flaw of "development" is that it is a concept invented by the global North and imposed on the global South. She speaks to students from across the world at Oxford University's Blavatnik School of Government, who and then faces their questions. The lecture is chaired by the school's dean, Professor Ngaire Woods. Producer: Julie Ball.