After 40 years of largely cooperative Sino-US relations, policymakers, politicians, and pundits on both sides of the Pacific see growing tensions between the United States and China. Some go so far as to predict a future of conflict, driven by the inevitable rivalry between an established and a rising power, and urge their leaders to prepare now for a future showdown. Others argue that the deep economic interdependence between the two countries and the many areas of shared interests will lead to more collaborative relations in the coming decades.