Andrew Copson is the Chief Executive of Humanists UK, formerly known as the British Humanist Association, as well as the current President of the International Humanist and Ethical Union. He also studied Classics and Ancient and Modern History at the University of Oxford.

His new book is called Secularism and it's a primer on the history of the philosophy, what it means today, and how it offers a solution to some of the biggest conflicts in the world.

We spoke about the difference between secular and atheistic nations, the biggest threats to secularism around the world, and why even religious people ought to support a secular society.