"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:

Producer: Luke Mulhall