The rise of transnational forces and non-state actors, not to mention emerging powers like China, suggests that there are big changes on the horizon. But there is still reason to believe that, at least in the first half of this century, the US will retain its primacy in power resources and continue to play the central role in the global balance of power.
考虑到全球发展趋势的不可预测性，当然也就无法笃定地回答这个问题。跨国力量和非国家行动方的崛起——更不用说中国等新兴力量了——意味着全球局势的重大变化。但仍有理由相信，至少在本世纪上半叶，美国将仍然拥有实力源的主导地位，并继续在全球实力平衡中扮演核心角色。