Is it possible to persuade people to change their beliefs by force? John Locke thought not. People might say they believe in your God to save themselves from torture or being burnt at the stake, but you won’t change their actual beliefs that way. Narrated by Aidan Turner.

From the BBC Radio 4 series about life’s big questions – A History of Ideas. http://www.bbc.co.uk/historyofideas

This project is from the BBC in partnership with The Open University, the animations were created by Cognitive.