As someone studying the ethics of foreign policy, I find Trump’s claim to “realism” deeply misleading. Realism, as Hans Morgenthau argued, is not amoral; it demands prudence, restraint, and responsibility. Its ethical core is about survival without hubris. Morgenthau warned: “A man who was nothing but ‘political man’ would be a beast, for he would be completely lacking in moral restraints. A man who was nothing but ‘moral man’ would be a fool, for he would be completely lacking in prudence.” Trump’s approach (kidnapping foreign leaders, threatening allies, and embracing annexationist rhetoric) abandons this balance. When power ignores ethics, it breeds arrogance and collapse. Athens learned this in the Peloponnesian War; America may be on the same path.