Fifteen Eighty Four

Even as global politics feels increasingly chaotic, the behavior of the world’s leading powers remains strikingly predictable. New research shows that when great powers intervene abroad, they do so not to spread ideology or uphold norms — but to protect clients, preserve influence, and defend the hierarchies that sustain their status.

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Since the end of the Cold War, Western foreign policy has swung between liberal idealism and realist restraint. Today, as Washington and Beijing edge toward open rivalry and wars rage from Ukraine to Gaza, many assume that the age of Western-led “liberal interventions” — the Balkans, Iraq, Libya — has come to an end. Yet our research suggests a deeper continuity: great powers may have changed their rhetoric, but not their logic.

In Clients, Rivals, and Rogues, we examine four decades of great power behavior across revolutionary civil wars, arms transfers, and United Nations Security Council debates used both quantitative and qualitative research. The results reveal a consistent pattern. Great powers overwhelmingly intervene defensively, not offensively — in foreign civil wars to rescue allies, protect clients, and preserve networks of influence.  Very rarely do they intervene to punish “rogue states” or export their regime ideology. When the United States, France, or Russia deploys force abroad, it is far more often to defend an arms recipient or treaty ally than to pursue abstract moral causes or to topple a rival’s partner state.

The numbers are revealing. A country that has purchased major weapons from a great power in the previous five years is roughly 60 percent more likely to receive military support if a civil war breaks out. Prior security ties — not democracy, shared values, or even resource wealth —drive intervention. Most strikingly, great powers are no more likely to intervene against governments that engage in systematic human rights abuses than those that do not. 

Security hierarchy maintenance helps to make sense of these patterns. Washington’s rapid mobilization for Kyiv after 2022, Moscow’s tenacious defense of Bashar al-Assad, and Beijing’s conspicuous restraint in foreign conflicts all fit the same structural logic. Great powers defend clients because doing so signals reliability to others within their hierarchy — and because losing a client undermines their prestige and legitimacy.

The implications are sobering. Western fears that a rising China will emulate America’s 20th-century pattern of military intervention may be misplaced. Beijing has largely avoided expeditionary warfare since 1979, favoring economic and institutional tools — from the Belt and Road Initiative to the Asian Infrastructure Investment Bank — over force projection. Its foreign policy is assertive, but not kinetic. If China’s ambitions remain primarily commercial and regional, it is unlikely to replicate Washington’s record of far-flung military entanglements.

That does not mean complacency is warranted. The real danger lies in overlapping client networks — rival hierarchies of arms partners, defense treaties, and proxy forces that can pull multiple powers into simultaneous crises. In a world where intervention is defensive by design, deterrence and restraint, not confrontation, are the wiser strategic bets.

In the end, interventions are changing costume, not character. The humanitarian justifications of the 1990s may have faded, but the strategic choreography endures. Great powers still dance to the same tune — defending clients, countering rivals, and punishing defectors — all in service of status, credibility, and influence.

About the authors: Clients, Rivals, and Rogues: How Great Powers Shape Civil Wars is published by Cambridge University Press. Drawing on global data and original theory, the book reveals the hidden order behind the seeming chaos of modern intervention — showing that even in an unpredictable world, great power behavior remains strikingly predictable.