Leo Tilman and Charles Jacoby offer the first comprehensive assessment of the fundamental nature of organizational agility and then describe the essential leadership practices for achieving it. They show that agility is far superior to mere speed or adaptability. Pinpointing its distinctive features, they define agility as the ability to detect and assess changes in the competitive environment in real time and then take decisive action. They demonstrate that agility enables an organization to outmaneuver competitors by seizing opportunities; better defending against threats; and acting as a well-orchestrated collective of teams that are empowered to take disciplined initiative.