Amidst the desolate landscape of fallen great companies, Jim Collins began to wonder: How do the mighty fall? Can decline be detected early and avoided? How far can a company fall before the path toward doom becomes inevitable and unshakable? How can companies reverse course? In How the Mighty Fall, Collins confronts these questions, offering leaders the well-founded hope that they can learn how to stave off decline and, if they find themselves falling, reverse their course. Collins' research project-more than four years in duration-uncovered five step-wise stages of decline: