From the ambition to be successful in our careers to what we will have for lunch each day, instinct is the invisible motivating force that shapes our world. But how well do these instincts, our most basic modes of interacting with the world, equip us for modern life? We are driven to pursue material wealth and status. We have an innate impulse to find a mate, to fight to protect our young, and to find food and shelter. In Human Instinct, which accompanies a BBC1 television series, Robert Winston takes us to the forefront of modern science, exploring our instincts and gaining a deeper insight into the wonderful complexity of human nature.