The American experience in Vietnam divided us as a nation and eroded our confidence in both the morality and the effectiveness of our foreign policy. Yet our understanding of this tragic episode remains superficial because, then and now, we have never grasped the passionate commitment with which the Vietnamese clung to and fought over their own competing visions of what Vietnam was and what it might become. To understand the war, we must understand the Vietnamese, their culture, and their ways of looking at the world. Neil L. Jamieson, after many years of living and working in Vietnam, has...