Why did transatlantic policymakers target Russia with economic sanctions in response to its actions during the Ukraine conflict? Commentators perceived these sanctions as highly unlikely because they would have high costs for several European countries, and were surprised when they were finally adopted. Constructivist scholars employed explanations based on common norms and trust to explain the European Union’s agreement on economic sanctions in this case. I argue that the mechanism of international emotional resonance played a decisive role in altering the course of the United States and core European Union powers’ cooperation. A framework that combines resonance with emotional influence mechanisms of persuasion and contagion explains the precise timing of the policy shift, why European policymakers accepted sanctions at a substantial cost to their economy and how norms affected policy when they were empowered by intense emotions.

为什么跨大西洋政策制定者针对俄罗斯在乌克兰冲突期间的行为对其实施经济制裁？评论员认为这些制裁极不可能，因为它们会给几个欧洲国家带来高昂的成本，并且当它们最终被采用时感到惊讶。建构主义学者采用基于共同规范和信任的解释来解释欧盟在本案中的经济制裁协议。我认为，国际情感共鸣机制在改变美国与欧盟核心大国合作的进程中发挥了决定性作用。一个将共鸣与说服和传染的情绪影响机制相结合的框架解释了政策转变的确切时间，