Helen is joined in the studio by BBC New Generation Thinker Danielle Thom from the V&A in London and Dr Gillian Kenny from Trinity College in Dublin.

Dr Tom Charlton uncovers some surprising evidence that the original Darby and Joan were 17th Century radical pamphleteers. He heads to the first Darby and Joan club, which was opened in 1942 in Streatham, South London, and talks to Professor Ted Vallance at the University of Roehampton.

Maurice Casey joins us from Cambridge to discuss new evidence that Bolsheviks visited the scene of the Easter Rising in Dublin in 1916 to find out more about the Republicans' tactics.

Tom Holland is in Oxford to ask why there are memorials to Nazis in some of the colleges.

And Dominic Sandbrook takes us back to the oil crisis of 1973, which he feels is a pivotal year in history.

Producer: Nick Patrick
A Pier production for BBC Radio 4.