The Director of the British Museum, Neil MacGregor, retells the history of human development from the first stone axe to the credit card, using 100 selected objects from the Museum. Neil follows early humans as they slowly begin to move beyond their African homeland, taking with them one essential item - a hand axe. In the presence of the most widely-used tool humans have created, Neil sees just how vital to our evolution this sharp, ingenious implement was and how it allowed the spread of humans across the globe. Including contributions from designer Sir James Dyson and archaeologist Nick Ashton. Producer: Anthony Denselow.