What causes cultures to decline and fall?

The new BBC TV series Civilisations: Rise and Fall charts the decline of some of history's most famous cultures, from the Aztecs to the ancient Egyptians. Three of its experts – Islam Issa, Caroline Dodds Pennock and Luke Kemp – joined Matt Elton to explore some of the series' major themes, and why stories of a civilisation's decline might be more complicated than we first think. The HistoryExtra podcast is produced by the team behind BBC History Magazine. Learn more about your ad choices. Visit podcastchoices.com/adchoices