Each year, 200 million of us embark on a pilgrimage of some kind. We have been making ritual journeys for millennia, ever since our ancient ancestors followed migrating animals, coming together to hunt and celebrate. The era of setting out as a matter of survival is long gone, but the impulse to travel somewhere sacred to us remains. Victoria Preston discovers that, whether we set forth in search of solace or liberation, as an expression of gratitude or faith, journeys of meaning and purpose are always a powerful reminder that we are each part of something much greater than ourselves. From the Stone Age pilgrims of Anatolia to the present-day crowds at Glastonbury, 'We Are Pilgrims' is a quest to understand what drives this rich and varied human behaviour, unbounded by time or space, faith or identity.