We are raiding the Audio Long Reads archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2015: Ota Benga was kidnapped from Congo in 1904 and taken to the US, where he was exhibited with monkeys. His appalling story reveals the roots of a racial prejudice that still haunts us. Help support our independent journalism at theguardian.com/longreadpod