For decades, China's rise to power was characterized by its reassurance that this rise would be peaceful. Then, as Susan L. Shirk, shows in this sobering, clear-eyed account of China today, something changed. For three decades after Mao's death in 1976, China's leaders adopted a restrained approach to foreign policy. They determined that any threat to their power, and that of the Chinese Communist Party, came not from abroad but from withina conclusion cemented by the 1989 Tiananmen crisis. To facilitate the country's inexorable economic ascendence, and to prevent a backlash, they reassured the outside world of China's peaceful intentions. Then, as Susan Shirk shows in this illuminating, disturbing, and utterly persuasive new book, something changed. China went from fragile superpower to global heavyweight, threatening Taiwan as well as its neighbors in the South China Sea, tightening its grip on Hong Kong, and openly challenging the United States for preeminence…