『How Will You Measure Your Life?』要約

In How Will You Measure Your Life?, Clayton M. Christensen adapts his disruptive innovation theories from business to personal questions of meaning and happiness. Co-written with James Allworth and Karen Dillon, the book grew from a commencement address Christensen delivered at Harvard Business School, where he taught. Its central move is applying management frameworks to life: the theory of disruptive innovation, the "jobs to be done" concept, and the role of deliberate versus emergent strategy. Christensen argues that people, like companies, drift into careers and relationships through unexamined choices rather than intentional planning, and that pursuing prestige or short-term gratification often undermines long-term fulfillment. A key chapter uses the story of the Honda Super Cub to illustrate how strategy emerges from unplanned experiments, urging readers to stay open to unexpected opportunities. Another examines the "jobs to be done" lens, showing that products—and people—succeed when they understand the real task someone needs done. Christensen also warns against the "marginal cost" trap, drawing on the collapse of Dow Corning and the fate of Blockbuster to argue that rationalizing one small compromise can lead to disaster. He discusses the importance of measuring success by the right metrics, not just visible career achievements, and addresses the tension between professional ambition and family investment. The book includes reflections on personal integrity, drawing on Christensen's own experiences and those of his students at Harvard, and closes by urging readers to define their own purpose clearly and live by it. It is part memoir, part business case study, and part philosophical inquiry.