The economy uncertain, education in decline, cities under siege, crime and poverty spiraling upward, international relations roiling: we look to leaders for solutions, and when they don't deliver, we simply add their failure to our list of woes. In doing do, we do them and ourselves a grave disservice. We are indeed facing an unprecedented crisis of leadership, Ronald Heifetz avows, but it stems as much from our demands and expectations as from any leader's inability to meet them. His book gets at both of these problems, offering a practical approach to leadership for those who lead as...