If getting caught up in a popular uprising in China has taught me anything, it is that the past, present and future flow together as one with ferocious intensity. Looking back now at the eventful uprising at Tiananmen Square in Beijing in 1989 makes it all the more clear that what happened there was shaped by things that came before; and today’s China, basking in a post-Olympic glow and new-found national strength, is still profoundly haunted by the seminal events of 1989, though the topic is strictly taboo in the media and still feared by influential people in the leadership. I initially got involved in the demonstrations because of my interest in Chinese history, the abstract study of which I had pursued at college and in graduate school....