As the Asia-Pacific region rapidly becomes the world’s economic center, the relationship between its two major economic and military powers—China and the United States— has increasingly come under stress. The Pacific Community Initiative (PCI), a collaborative effort led by the Johns Hopkins School of Advanced International Studies (SAIS) and the Institute of International and Strategic Studies (IISS) at Peking University and funded by the China–United States Exchange Foundation, explores how the U.S. and China can cooperate to ensure medium- and long-term peace and prosperity by promoting effective institutionalization in the Asia-Pacific region.