For better or worse, fighting epidemics like Ebola or preventing the most harmful consequences of climate change requires solidarity and cooperation. Retreating into unilateralism, ultra-nationalism, or the politics of identity will produce nothing but a bitter, fragmented, parochial, and dangerous world.
无论如何，对抗埃博拉等传染病防止气候变化最危险的后果需要团结与合作。陷入单边主义、极端民族主义或身份政治只能让世界更苦涩、更分列、更狭隘、更危险。