China’s predicament offers good news and bad news for America. The good news is that, over the long run, the Chinese challenge may prove more manageable than many pessimists now believe. An unhealthy, totalitarian China won’t effortlessly surge past America as the world’s leading power. We may one day look back on China as we now view the Soviet Union—as a formidable foe whose evident strengths obscured fatal vulnerabilities. The bad news is that getting to the long run won’t be easy. During the 2020s, the pace of rivalry will be torrid, and the prospect of war will be frighteningly real.

