The past and future of the human brain

Neuroscientist David Eagleman argues that the brain is like a field of battle: subject to conflicting drives and impulses that we are only just beginning to understand. He talks to Sally Davies, FT Weekend's digital editor, about the nature of consciousness, why human beings are hardwired for xenophobia, and how technology can extend our cognitive powers. To read an exclusive extract from David's new book, go to ft.com/eagleman Music: Another Cultural Landslide, 'Everybody's got a brain'