“THE Pacific is big enough for all of us,” declared Hillary Clinton, America’s secretary of state, on August 31st. Or is it? Xinhua, the official Chinese news agency, countered this week that the ocean is also “small enough to create conflicts that can threaten peace in the region and the world at large”. Certainly, America and China have recently been bumping heads in the western Pacific. And a visit by Mrs Clinton to Beijing this week served only to underscore the difficulty in managing their rivalry.