Professor Alice Roberts is a writer, broadcaster, and Vice President of Humanists UK. She is the author of nine books including EVOLUTION: THE HUMAN STORY, THE INCREDIBLE UNLIKELINESS OF BEING and the Sunday Times bestsellers BURIED and ANCESTORS. Making her television debut on Time Team in 2001, she has become one of Britain's best-known broadcasters and has written and presented a huge range of television series for BBC2, BBC4 and Channel 4, including The Incredible Human Journey, Origins of Us and Ice Age Giants, and several Horizon programmes.

Andrew Copson is the Chief Executive of Humanists UK and President of Humanists International. He has provided a humanist voice on many television and radio programmes and written on humanism for publications including The Economist, New Statesman, Guardian, Prospect, The Times and Buzzfeed. With AC Grayling, he edited the Wiley Blackwell Handbook of Humanism and he is the author of SECULARISM: A VERY SHORT INTRODUCTION. He has been the humanist contributor to many compendiums and anthologies of quotations such as WISDOM FOR LIFE and numerous resources for schools.