Coming up with a good idea isn't that hard; it's much harder to choose the best one out of a bunch of ideas. Building a strong corporate culture is not easy—but it is much more difficult to change it if it is no longer appropriate for changing circumstances. It's worth thinking twice before openly criticizing your boss - but there are companies where such criticism is not only allowed, but encouraged. Adam Grant, a Wharton School of Business professor and management psychologist, explains how innovative thinkers can overcome groupthink and silos, differentiate over-optimism from prudent risk-taking—and, as a result, pursue extraordinary ideas that can change the world. Guides on this journey will be a CIA analyst who changed the attitude of intelligence officers to working with classified information, an Apple employee who was not afraid to object to Steve Jobs himself, and the creators of a television series that at first not a single television boss liked - and then became the most popular in the world.< /p>