Whether constitutional or not, the author argues that they are not a good idea.
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The terms “assassination” and “targeted killing” were once legally distinguishable. Until 2001, most people accepted a distinction between illegal assassinations of political figures during peacetime and lawful targeting of those who were an imminent threat in an armed conflict. Since 9/11, under the framework of global counterterrorism, these differences have become a matter of semantics. Any killing the president orders is now apparently lawful, at least under U.S. domestic law. However much we parse the finer legal points of the legitimacy of self-defense under Article II, or the Quds Force’s April 2019 designation as a Foreign Terrorist Organization, or the relevance or irrelevance of Executive Order 12333 banning assassinations, or even the unchecked growth of U.S. executive power, we are looking at the world through a straw. Whether or not it was technically a legal act, Soleimani’s killing will have a historic global influence.
To understand why this is so, we must start with the history of assassination. Assassination is one of the oldest tools of statecraft, a favorite tactic of weak states seeking leverage against strong powers. In “The Art of War” (5th century BCE), Ancient Chinese strategist Sun Zi wrote of assassination as a way to avoid costly warfare, using spies to gain “the identities of the defending commander, his retainers, counselors, gate officers, and sentries” so as to eliminate them. Indian statesman Kautilya also explained the benefits of assassinating enemy leaders to gain an advantage in “Arthashastra” (1st century BCE), his comprehensive guide to governance. The Iranians invented the term “assassins” in the 12th century. Rulers were commonly assassinated in 15th-century Italy: Niccolo Machiavelli spent much of The Prince discussing how to avoid it.
Banning assassination was not just the right thing to do; it was how modern nation-states consolidated their power. What the United States has done with the hit on Soleimani is undermine a pillar of support for stronger, status quo powers. With the development of international law in the 18th century, most states ruled out assassination precisely because it advantaged weaker states and nonstate actors. The Lieber Code, written during the American Civil War, expressly prohibited it. The Hague Conventions of 1899 and 1907 also banned assassination, and the Geneva Conventions forbade killing anyone not directly involved in hostilities. Assassination as statecraft declined during this period for normative reasons but also because major powers feared retaliation and got better at physically protecting their territory. In the century that followed (and influenced by the devastating global consequences of the 1914 killing of Archduke Franz Ferdinand), the ban on assassinations was a practical way to prevent state leaders and senior officials from being killed and upending the international system. When major powers put certain people, such as political leaders and senior officials, off-limits for targeting by governments not engaged in a formal state of war, the act was a practical move that served their interests.
