Moreover, contemporary problems – for example, thwarting the spread of materials and weapons of mass destruction, maintaining an open world economy, slowing climate change, and combating terrorism – cannot be managed, much less solved, by any single country. Only collective efforts can meet common challenges; the more global the response, the more likely that it will succeed.
另一方面，诸如遏制大规模杀伤性武器和原料的扩散，维持一个开放的世界经济，减缓气候变化以及打击恐怖主义等当前重大问题都不是任何单一国家所能处理的，更不用说解决了。只有依靠集体力量才能应对这些共同挑战。而全球各国越能协同一致应对挑战，成功的可能性也就越大。