Stress, obesity, declining mental health, addiction, back pain, bowel diseases and violence; a stark checklist of present-day problems, and every one of them is a legacy of our evolutionary past.In Unfit for Purpose, biologist and broadcaster Professor Adam Hart explores the mismatch between our fundamental biology and the modern world we have created. In each chapter, Adam explores how many biological adaptations that evolved to help us survive and thrive in a very different world are now working against us. For example, humans are superbly adapted famine survivors. Obesity might be a disease in the modern world, but it’s really just a troublesome side-effect of some effective evolutionary brilliance. And in today’s society, one of the biggest killers is stress. What started out as a life-saving ‘fight or flight’ response in the face of bear attack might now cause headaches, loss of sex