We live in a time unlike in generations past. Thanks to inflation, housing markets, and health-care costs soaring—and stock portfolios and wages plummeting—there are many people today (regardless of age) who feel they have yet to grow up and “get their sh*t together.” But it’s not just the big things like buying our own home, getting married, or having children that make us feel like grown-ups—it’s all the necessary little things along the way that nobody celebrates, but that are hard nonetheless.

His work is cited by the world's best-known thought leaders, from Steve Jobs to Malcolm Gladwell. In this classic bestseller—one of the most influential business books of all time—innovation expert Clayton Christensen shows how even the most outstanding companies can do everything right yet still lose market leadership.Now with a foreword by Marc Benioff, the cofounder and CEO of Salesforce, Christensen explains why most companies miss out on new waves of innovation. No matter the industry, he says, a successful company with established products will get pushed aside unless managers know how and when to abandon traditional business practices....