Religious belief looks more precarious in the modern world than ever before. But is that the truth? Dan Snow explores the role of unbelievers throughout history, to discover if we're uniquely unbelieving now, or whether there have always been those who wouldn't believe. This project was made possible by the Understanding Unbelief programme, the University of Kent (2017-2020) funded by the John Templeton Foundation (JTF grant ID#60624). The opinions expressed in this film do not necessarily reflect the views of the John Templeton Foundation.