U.S. ratification of UNCLOS is another important step to influence the evolution of future interpretations of freedom of navigation toward more open stipulations than some of the states around the South China Sea now espouse. Although a more difficult proposition, the United States should demand the clarification of the historic claims made in the South China Sea, in order to facilitate negotiating a settlement, accelerate economic development, and remove the potential of shutting down all foreign navigation through the region. Support to Vietnam’s current islet occupations in the Spratlys, its claims to coastal EEZ and continental shelf areas in compliance with UNCLOS, and specific historic economic rights could wean Vietnam from its otherwise weak historic claims, and start sincere bargaining by linking the Paracel and Spratly disputes in a comprehensive agreement. The United States has less influence to change China’s position on historic rights because the ambiguity of its positions has served China well. Here, appealing to China’s future role in world politics may help to change its parochial freedom of navigation perspective into a more global one like the United States holds.