In many ways, we’re more comfortable than ever before. But could our sheltered, temperature-controlled, overfed, underchallenged lives actually be the leading cause of many our most urgent physical and mental health issues? In this gripping investigation, award-winning journalist Michael Easter seeks out off-the-grid visionaries, disruptive genius researchers, and mind-body conditioning trailblazers who are unlocking the life-enhancing secrets of a counterintuitive solution: discomfort.