Traditionally, the South China Sea (SCS) issue was not on the negotiation table between the United States and China. However, the tensions between the United States and China over the SCS have gradually simmered up to a strategic level. Why and how did the SCS become a flashpoint between the United States and China? Will the United States and China really go to war over the SCS? Why did China adopt an "assertive" policy towards the South China Sea in the 2000s? What will regional actors do in the face of this "new normal" of competition between China and the United States? Will multilateral institutions in the Asia Pacific alleviate the potential conflicts over the SCS disputes? How will US-Chinese competition in the SCS shape the dynamics of Asian security? This edited book addresses these questions systematically and theoretically, with contributions from leading scholars in the field of US-China relations and Asian security from the United States, Australia, the United Kingdom, and Singapore. It elevates the analysis of the SCS disputes from maritime and legal issues to the strategic level between the United States and China.