I find Chinese debates about their political system domestically, but also about China's claims in the international system, to be among the most original and surprising and exciting of our time. The starting point is a system that none of us had anticipated, which I call Leninist capitalism, but also obviously because it is the most important emerging power. The question of China's relations with the United States in particular, and the rest of the world in general, is the question of war and peace in the 21st century.