"Doom-prepping" tech billionaires have been in the headlines recently and whether it’s ecological crisis or a breakdown in law and order, fear of societal collapse seems to lurk in the background of a lot of discussion in politics and wider society. But what does it mean? When has it happened in the past? Can we avoid it – or survive it – in the future? Joining presenter Shahidha Bari for Radio 4's roundtable discussion about the ideas shaping our world are: Luke Kemp from the Cambridge Centre for the Study of Existential Risk, the writer and commentator Peter Hitchens, classical historian Neville Morley, historian of modern politics Phil Tinline and Rhiannon Firth, sociologist at University College London.

Producer: Luke Mulhall