Rethinking Power in International Relations: Zero-Sum Limitations and the Variable-Sum Paradigm in a Complex Global Order
Introduction
The concept of power has long been central to the study of international relations (IR), serving as a fundamental explanatory device in theories of conflict, alliance formation, and systemic change. Traditionally, especially within classical and neorealist traditions, power has often been conceptualized in zero-sum terms: the gain of one state necessarily entails the loss of another. This framework, rooted in a competitive and anarchic vision of international politics, has profoundly shaped strategic thinking and foreign policy across the twentieth century.
However, as global interdependence has intensified—economically, technologically, environmentally, and institutionally—the zero-sum logic appears increasingly inadequate for capturing the complex interplay of conflict and cooperation among states. This essay critically evaluates the limits of the zero-sum conception of power and argues that contemporary international relations are better understood through a variable-sum framework. Drawing on theoretical insights from liberal institutionalism, constructivism, and critical IR theory, it examines how power can be redefined to include mutual gains, norm diffusion, and institutional co-dependence, while also addressing cases where zero-sum dynamics remain operative.
I. Zero-Sum Power: The Realist Tradition and Its Enduring Relevance
1. The Realist Premise
The zero-sum conception of power is most fully developed within classical realism and neorealism. Thinkers such as Hans Morgenthau, Kenneth Waltz, and John Mearsheimer posit that international politics is fundamentally driven by competition for relative power under anarchy. In this view, states prioritize survival, security, and autonomy, and gains by one actor inherently threaten others.
Mearsheimer’s offensive realism, for instance, posits that the international system compels states to pursue hegemonic power, as they can never be certain of others’ intentions. Similarly, Waltz’s structural realism emphasizes the balancing behavior that arises when one state accrues disproportionate power—an inherently zero-sum dynamic. This logic underpins deterrence theory, arms races, and much of Cold War strategy.
2. Continued Utility in Strategic Rivalries
There remain empirical domains in which the zero-sum conception continues to offer explanatory value:
- Military Competition: In the Indo-Pacific, U.S.-China military rivalry over Taiwan or freedom of navigation involves tangible power balancing and zero-sum perceptions.
- Cyber and Surveillance Politics: Control over data, digital infrastructure, and intelligence networks often reflects zero-sum security concerns.
- Geoeconomic Tools: The weaponization of trade (e.g., U.S.-China tariffs), sanctions, and financial systems (e.g., SWIFT exclusion) frequently assumes that one state’s economic advantage may come at the expense of another.
In these domains, the logic of exclusion, deterrence, and denial remains powerful.
II. The Emergence of Variable-Sum Logics: Mutual Gains, Complex Interdependence, and Shared Threats
1. Complex Interdependence and Liberal Institutionalism
The liberal tradition, particularly as articulated by Robert Keohane and Joseph Nye in Power and Interdependence (1977), advances a variable-sum perspective. In an increasingly interconnected world, power is not always zero-sum; states may achieve mutual gains through cooperation, trade, and institution-building.
For example, participation in multilateral institutions such as the World Trade Organization, the Paris Agreement, or the G20 offers states platforms for advancing common interests while preserving autonomy. Interdependence means that coercive or competitive actions can incur reciprocal costs. A trade war, for instance, may hurt both initiators and targets in integrated supply chains—demonstrating the negative-sum implications of zero-sum strategies.
2. Public Goods and Global Threats
Climate change, pandemics, financial instability, and nuclear proliferation are global challenges that require collective action. These threats are non-excludable and non-rivalrous, making unilateral approaches ineffective. Cooperation, in such cases, can generate variable-sum outcomes—either mutual gain or mutual loss.
The COVID-19 pandemic illustrated this vividly. Vaccine nationalism delayed global immunization, while cooperative mechanisms like COVAX were intended to ensure equitable distribution. Similarly, climate action necessitates burden-sharing rather than zero-sum bargaining. The logic of “collective security” under the UN Charter or the Nuclear Non-Proliferation Treaty also rests on variable-sum premises.
3. Economic Globalization and Functional Cooperation
The global economy, governed by regimes of trade, finance, and investment, creates a dense web of mutual dependencies. The concept of comparative advantage in economics illustrates how trade can be positive-sum. While globalization has produced winners and losers, its very architecture assumes that states can benefit simultaneously from open markets and integration.
Even amid strategic rivalry, economic interdependence persists. For instance, despite rising tensions, China and the U.S. remain each other’s major trading partners. Similarly, Middle Eastern oil exporters and Asian industrial economies maintain interlocking interests in energy security and capital flows.
III. Constructivist and Critical IR Perspectives: Power Beyond Materialism
1. Power as Socially Constructed
Constructivist scholars such as Alexander Wendt reconceptualize power not merely as material capability, but as shaped by identities, norms, and intersubjective understandings. From this vantage point, power can be constitutive—the ability to shape what actors want or perceive as legitimate.
For example, norm entrepreneurs and international institutions wield soft power (Nye, 2004) to influence behavior without coercion. The spread of human rights norms, democratic governance models, or environmental standards exemplifies how states and non-state actors can generate variable-sum outcomes by transforming preferences and identities rather than competing over finite resources.
2. Power as Discursive and Structural
Critical theorists—including neo-Gramscians and post-structuralists—extend this further, viewing power as embedded in global discourses and structures. For them, global capitalism, neoliberalism, or developmental regimes impose hierarchies not through direct subtraction (zero-sum), but through hegemonic consent and institutional reproduction.
This framework shifts attention from overt conflict to structural violence, epistemic dominance, and normative asymmetry. It also helps explain how formerly “weaker” actors—such as transnational movements or Global South coalitions—can assert influence by challenging dominant paradigms (e.g., calls for vaccine equity, debt justice, or climate reparations).
IV. The Limits and Resilience of Zero-Sum Thinking
While variable-sum frameworks more accurately reflect contemporary interdependence, zero-sum assumptions persist because they serve powerful strategic, psychological, and ideological functions:
- Domestic Politics: Nationalist populism often thrives on zero-sum narratives—e.g., immigration as threat, trade as exploitation—fueling protectionism and exceptionalism.
- Strategic Culture: Realpolitik traditions in foreign policy establishments sustain zero-sum reflexes, particularly in great power rivalries and security dilemmas.
- Crisis Moments: In situations of acute insecurity—e.g., wartime resource competition, or nuclear standoffs—cooperative logic is often supplanted by survivalist calculus.
Hence, rather than fully rejecting zero-sum frameworks, it is more productive to recognize the conditional coexistence of both logics—what Amitav Acharya terms a “multiplex world,” marked by a plurality of governance modes and power conceptions.
Conclusion
The zero-sum conception of power, while foundational to realist paradigms, offers a limited and increasingly inadequate lens through which to understand the complex interplay of conflict and cooperation in contemporary international relations. Variable-sum approaches—emphasizing mutual gains, shared vulnerabilities, and discursive influence—provide a more nuanced framework for analyzing global dynamics characterized by interdependence, asymmetrical globalization, and transnational threats.
However, the persistence of strategic competition, militarized rivalries, and exclusionary nationalism indicates that zero-sum reasoning remains embedded in both policy practice and popular imagination. The future of global order may depend less on the victory of one framework over another, and more on the capacity of actors to navigate between competitive imperatives and cooperative necessities—crafting strategic pluralism in a world where power is simultaneously rivalrous and relational.
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