There is significant evidence that an effective organizational culture provides a major competitive edge—higher levels of employee and customer engagement and loyalty translate into higher growth and profits. Many business leaders know this, yet few are doing much to improve their organizations’ cultures. They are discouraged by misguided beliefs that an executive’s tenure and an organization’s attention span are too short for meaningful transformation. James Heskett provides a roadmap for achievable and fast-paced culture change. He demonstrates that an effective culture supplies the trust that makes managing change of all kinds easier. It provides a foundation on which changes in strategy can be based, and it’s a competitive edge that can’t easily be hacked or copied. Examining leading companies around the world, Heskett details how organizational culture makes employees more loyal, more productive, and more creative. He discusses how to quantify its effects in order to sell the notion of culture change to the organization and considers how to preserve an organization’s culture in the face of the trend toward remote work hastened by the COVID-19 pandemic. Showing how leadership can bring about significant changes in a surprisingly short time span, Win from Within offers a playbook for developing and deploying culture that enables outsized results. It is a groundbreaking demonstration of organizational culture’s role as a foundation for strategic success—and its measurable impact on the bottom line.