A revolution in feeling: How the Enlightenment forged our understanding of human emotion and the ways in which this relates to the contemporary political world. Laurie Taylor talks to the literary historian, Rachel Hewitt; Russell Foster, political scientist at King's College London; and to Karin Wahl-Jorgensen, Director, Research Development and Environment, Cardiff School of Journalism, Cardiff University. Revised repeat.

Producer: Jayne Egerton.