Nancy Koehn is a historian and the James E. Robison Professor of Business Administration at Harvard Business School. Koehn’s research focuses on courageous leadership and how leaders, past and present, craft lives of purpose, worth, and impact. Her latest book, Forged in Crisis: The Power of Courageous Leadership in Turbulent Times, spotlights how five of history’s greatest leaders managed crises and what you can learn from their experience.