Trump and Clausewitz vs Thomas Aquinas and the Post 1945 World Order

“War,” the Prussian military thinker Carl von Clausewitz wrote, “is a mere continuation of policy by other means.” If there is one line that virtually every Army officer learns from Clausewitz’s posthumously published 1832 book, “On War,” it’s that description of the purpose of armed conflict.

Those words were among the first that popped into my head when I woke up Saturday morning to the news that the American military had attacked Venezuela; seized its dictator, Nicolás Maduro; and brought him to the United States to face criminal charges.

The reason those words occurred to me was simple: The attack on Venezuela harks back to a different time, before the 19th-century world order unraveled, before two catastrophic world wars and before the creation of international legal and diplomatic structures designed to stop nations from doing exactly what the United States just did.

One of the most important questions any nation must decide is when — and how — to wage war. It’s a mistake, incidentally, to view Clausewitz as an amoral warmonger. He wasn’t inventing the notion he describes; he was describing the world as it was. His statement is a pithy explanation of how sovereign states have viewed warfare for much of human history.

When a strong state operates under the principle that war is just another extension of policy, it is tempted to operate a bit like a mob boss. Every interaction with a weaker nation is tinged in some way with the threat of force: Nice little country you have there — shame if something happened to it.

This is not fanciful. In a telephone conversation with The Atlantic’s Michael Scherer, President Trump threatened Venezuela’s new leader, Delcy Rodríguez, who served as Maduro’s vice president. “If she doesn’t do what’s right,” Trump said, “she is going to pay a very big price, probably bigger than Maduro.”

Diplomacy and economic pressure are almost always still a first resort for powerful nations, but if they fail to achieve the intended results, well, you can watch footage from the American strike in Venezuela to know what can happen next.

But the Clausewitzian view isn’t the only option for nations and their leaders. There is a better model for international affairs, one that acknowledges the existence of evil and the reality of national interests but also draws lines designed to preserve peace and human life.

Carl von Clausewitz, meet Thomas Aquinas.

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