Edward Hallett Carr (1892–1982) was one of the most influential British historians, diplomats, and theorists of international relations in the 20th century. Known for his deep skepticism of idealism in global politics, Carr’s work laid the foundation for realist thought in international relations, especially through his landmark book The Twenty Years’ Crisis: 1919–1939, published on the eve of World War II.
Carr was born in London and educated at the prestigious Merchant Taylors’ School before studying Classics at Trinity College, Cambridge. He entered the British Foreign Office in 1916 during World War I and began his career as a diplomat. His experience working in international affairs during the volatile interwar period profoundly shaped his views on the failure of diplomatic idealism.
During the interwar years, Carr observed how European leaders placed faith in international law, morality, and institutions—notably the League of Nations—to maintain global peace after the devastation of World War I. These efforts, driven by a liberal optimism about human progress and cooperation, ultimately failed to prevent the rise of fascism, militarism, and a second world war. This failure convinced Carr that utopian thinking in international affairs was dangerously naïve.
Carr’s most famous and enduring work, The Twenty Years’ Crisis: 1919–1939, was published just as Europe descended into World War II. In this book, he launched a fierce critique of liberal idealism, particularly the notion that moral principles or international law alone could govern state behavior. He argued that idealist thinkers misunderstood the central and enduring role of power in international politics. States, he insisted, do not act based on moral ideals, but rather based on their self-interest, driven by concerns for security, influence, and survival in an anarchic international system. Carr’s work did not merely attack idealism—he also introduced the intellectual foundation of realism, an approach that recognizes the inevitability of conflict, the limits of cooperation, and the need for states to prioritize national interest over abstract norms.
After leaving the Foreign Office, Carr became a respected academic, holding various positions including fellowships at Oxford and Cambridge, and an editorial role at The Times. Later in his career, he developed an interest in Marxist theory and wrote a massive 14-volume history of Soviet Russia, earning recognition as a major historian of the USSR. Despite his turn toward Marxist historical materialism later in life, The Twenty Years’ Crisis remains his most widely read and debated work, especially within the field of international relations.
Carr’s intellectual legacy is felt in the development of classical realism, where he is often positioned alongside Hans Morgenthau as one of its founders. His critique of moralism in international politics continues to resonate in today’s debates over military intervention, international institutions, and the balance of power.
Utopianism vs. Realism: E.H. Carr’s Foundational Debate in The Twenty Years’ Crisis
In The Twenty Years’ Crisis: 1919–1939, Edward Hallett Carr presents one of the most significant conceptual frameworks in the history of international relations: the tension between utopianism and realism. According to Carr, the failure to maintain international peace in the two decades following World War I was rooted in the dominance of utopian thinking, which ignored the enduring role of power in global politics. He sharply criticizes what he saw as a naïve faith in moral progress, legal norms, and international institutions, arguing that such beliefs did not correspond with the actual behavior of states in the international system.
Carr categorizes international thinkers and policymakers into two broad intellectual traditions. On one side are the utopians (often referred to later as idealists), who were heavily influenced by the legacy of the Enlightenment and 19th-century liberalism. These thinkers believed that human society—both domestic and international—was steadily progressing toward a more rational, cooperative, and peaceful order. They placed their faith in the power of international law, moral norms, free trade, diplomacy, and institutions like the League of Nations to manage disputes and eliminate war. They saw war as a problem of poor institutional design and moral failure, something that could be overcome through rational planning and ethical education. Utopians also held that human nature was malleable and perfectible; people, and by extension states, could be taught to act in the interest of the greater good rather than narrow self-interest. Figures like U.S. President Woodrow Wilson, with his vision of a League of Nations to guarantee collective security, and British writer Norman Angell, who argued that war was economically irrational in an interconnected world, are key representatives of this tradition.
On the opposite side are the realists, a group Carr identifies as more grounded in history and the observable facts of power dynamics. Realists argue that the international system is anarchic—there is no overarching authority above sovereign states—and thus, conflict is inevitable. States must prioritize survival, security, and the protection of national interest, even at the expense of international cooperation or moral considerations. In this view, human nature is flawed and self-interested, and states reflect those tendencies. Moral language and ideals, realists argue, are often constructed or manipulated by powerful actors to legitimize their interests. Carr’s realism challenges the notion that peace can be engineered solely through the spread of good intentions, treaties, or legal agreements. Instead, he maintains that any sustainable order must be grounded in a balance of power and the acknowledgment of real interests.
Carr believed that between 1919 and the late 1930s, international relations were largely dominated by utopian illusions. Leaders and theorists underestimated the resentment and revisionist ambitions of countries like Germany, which had been humiliated and economically weakened by the Treaty of Versailles. Utopianism, according to Carr, blinded policymakers to the resurgence of power politics and enabled the unchecked rise of fascism and militarism. While well-intentioned, the utopian reliance on legalistic frameworks and moral persuasion proved powerless against the stark realities of aggression, expansionism, and rearmament.
Ultimately, Carr did not call for a complete rejection of utopian thinking. Rather, he emphasized that utopia without realism is empty, and realism without utopia is blind. While he is often labeled a realist, his argument is more dialectical: he called for a synthesis of utopian vision and realist pragmatism. This balance, he believed, was essential for building a stable and just international order—one that recognizes the role of power, but is still guided by a desire for progress and peace.
The Role of Power in International Relations: E.H. Carr’s Realist Perspective
For Edward Hallett Carr, power is not merely one element of international relations—it is its very foundation. In The Twenty Years’ Crisis, Carr decisively rejects the idea that international politics can be governed solely by moral principles, legal norms, or institutional frameworks. Instead, he insists that any meaningful discussion of order or justice in world affairs must begin with an understanding of power. Without acknowledging power, Carr argues, attempts to build international cooperation are not only ineffective—they are illusions.
Carr identified three primary dimensions of power that operate in the international sphere:
- Military Power – This is the most visible and immediate form of power, defined by a state’s ability to coerce or defend through armed force. Military capabilities are often the ultimate guarantor of a state’s sovereignty and influence, particularly in moments of crisis or conflict. For Carr, military power underpins diplomacy; without it, negotiations lack credibility.
- Economic Power – Beyond force, Carr recognized the critical role of economic leverage. States with greater industrial capacity, financial resources, and control over trade can shape the behavior of others without direct coercion. Economic sanctions, aid, access to markets, and control over resources all function as tools of influence. Carr saw economic power not only as a complement to military strength, but as a potential alternative in the practice of international dominance.
- Power over Opinion – Perhaps the most subtle but deeply influential form of power, this dimension refers to a state’s or elite’s ability to shape ideas, values, and perceptions. Carr includes education, propaganda, religion, and broader ideological influence in this category. He viewed this kind of power as a crucial mechanism through which dominant states legitimize their interests, present their policies as morally justified, and win the consent of both domestic and international audiences.
Crucially, Carr did not view power solely as a tool of oppression or imperialism. Instead, he saw it as a necessary condition for any stable and functional international order. Law, morality, and institutions, he argued, are only effective when they are backed by power. Without power, these constructs become empty rhetoric. They may be noble in principle, but they cannot bind states or prevent aggression in practice.
Carr’s critique is particularly sharp against the interwar liberal belief in moral universalism. He contends that what is presented as universal moral law is often shaped by the interests of powerful states. For example, the economic liberalism promoted by the British Empire or the international legalism championed by the United States reflected, in his view, the conditions favorable to their power rather than impartial norms. Thus, Carr exposes the instrumental use of morality—how it can become a cloak for strategic interests.
In sum, Carr’s realist theory positions power not as something to be eliminated, but as the necessary groundwork for any political or legal order. While utopians imagined a world governed by reason and cooperation, Carr reminds us that without a realistic appraisal of power, such visions are destined to fail. Only when power is acknowledged and integrated into the framework of international relations can a more durable and honest peace be pursued.
The Illusion of Unity: Carr’s Critique of the “Harmony of Interests”
One of E.H. Carr’s most powerful and enduring criticisms in The Twenty Years’ Crisis is his rejection of the notion that states inherently share common, long-term interests—a concept he famously described as a “myth.” This idea, central to interwar liberalism, held that cooperation among nations would naturally emerge because all states ultimately seek peace, prosperity, and mutual benefit. Carr dismantles this belief by exposing its ideological nature and strategic function: it is not an objective truth, but a narrative constructed by powerful states to preserve their dominance.
At the heart of Carr’s critique is the recognition that international politics is fundamentally shaped by inequality—of power, of resources, and of strategic interest. The doctrine of the “harmony of interests,” he argued, serves the status quo powers, the dominant states that have the most to gain from maintaining existing arrangements. By promoting ideas such as free trade, open markets, and non-aggression, powerful nations present their interests as if they were the shared interests of all. In doing so, they cloak self-interest in universalist rhetoric.
For example, a powerful industrialized state might champion free trade not because it benefits everyone equally, but because it has a competitive advantage and seeks to expand its own economic influence. Similarly, the principle of self-determination—widely promoted by liberal powers after World War I—was often applied selectively. It was upheld in European contexts where it aligned with strategic interests, but ignored or suppressed in colonial territories, where it might undermine imperial control. In Carr’s view, these inconsistencies reveal that moral principles in international relations are not applied impartially, but are often instruments of power.
Carr argued that the belief in a natural harmony among states distorts the reality of international conflict, which is frequently rooted in diverging national interests. Rising powers, like Germany and Japan in the 1930s, did not experience the international order as harmonious or fair—they saw it as an imposition by victors of the previous war. The liberal assertion that all nations could benefit equally under the League of Nations system ignored the grievances and ambitions of those dissatisfied with the status quo.
His most striking formulation of this critique is the assertion that:
“The doctrine of the harmony of interests is the special ideology of the status quo powers.”
This sentence encapsulates Carr’s broader realist thesis—that power is always present, even in appeals to morality and justice, and that what appears as international consensus often reflects the disguised dominance of the few over the many.
By unmasking the harmony of interests as a self-serving ideology, Carr challenges the foundational assumptions of liberal internationalism. He calls instead for a more sober, realistic engagement with international politics—one that recognizes the role of conflicting interests, strategic calculations, and unequal power. Only by acknowledging these realities can genuine efforts toward peace and order begin.
Law and Morality Are Not Neutral: Carr’s Realist Deconstruction
In The Twenty Years’ Crisis, E.H. Carr continues his critical examination of liberal internationalism by challenging another cherished belief: the idea that international law and morality are neutral, universal, and objective standards. Far from being impartial principles that govern all states equally, Carr argues that these concepts are often deeply political, constructed and applied in ways that serve the interests of dominant powers. This analysis reflects a central tenet of realist thought—that behind every moral claim lies a strategic calculation.
Carr observed that after World War I, international discourse was saturated with high-minded appeals to justice, fairness, and self-determination. Yet in practice, these values were inconsistently applied and frequently subordinated to the geopolitical interests of the victorious Allied powers. The Treaty of Versailles, for instance, was framed as a just settlement to ensure peace, but Carr saw it as a thinly veiled exercise of victors imposing their will on a defeated Germany. The result was not a durable legal order, but a deeply resentful and unstable Europe.
He argued that morality in international relations is not above politics; it is shaped by the existing distribution of power. Dominant states project their own values as if they were universal, and in doing so, they legitimize the status quo and delegitimize revisionist claims. This process enables power to masquerade as justice. What appears as moral law is often an expression of the preferences and priorities of the powerful, rather than a set of universally agreed-upon norms. In this sense, Carr anticipated later critiques from critical theorists and postcolonial scholars who would similarly argue that the international legal order reflects the history and priorities of empire and hegemony.
Furthermore, Carr challenges the notion that moral progress in international politics is linear or inevitable. He warns against the belief that humanity is moving inexorably toward a more peaceful and law-governed world. History, in his view, does not support such optimism. Instead, the use of morality in diplomacy is often opportunistic—states appeal to moral principles when doing so aligns with their interests, and abandon them when they become inconvenient. For Carr, this instrumental use of morality undermines the credibility of international law and exposes the fragility of institutions built on idealist assumptions.
None of this implies that Carr rejected morality altogether. Rather, he insisted that for moral principles and legal norms to have real meaning in international affairs, they must be supported by power. Law without enforcement is ineffective, and morality without recognition of political realities is hollow. Power gives substance to principle—without it, laws are merely words, and ideals become fantasies.
Carr’s perspective leads to a crucial realist insight: a truly just and stable international order cannot be based solely on abstract moralism or legalism. It must reflect the actual balance of power and be responsive to the interests of all major actors. Only then can law and morality transcend their role as instruments of dominance and begin to function as frameworks for genuine cooperation.
The Dialectic of Realism and Utopianism
While Edward Hallett Carr is often labeled a founding realist, a closer reading of The Twenty Years’ Crisis reveals a more nuanced and dialectical approach to international relations theory. Carr did not simply dismiss utopianism outright; instead, he argued that both realism and utopianism are necessary—but insufficient—on their own. His critique of idealism was not a rejection of values or vision, but a demand that they be grounded in historical experience and political reality. Conversely, his advocacy for realism was not an endorsement of cynicism or brute force, but a call for clarity, restraint, and sober analysis.
Carr’s central contention is that progress in international politics requires a synthesis of these two opposing modes of thought. He describes realism and utopianism as opposing but interdependent elements in political theory and practice. Realism emphasizes what is—the world as it exists, with its entrenched interests, power struggles, and enduring conflict. Utopianism, in contrast, imagines what ought to be—a vision of a world shaped by justice, cooperation, and reason. Each has strengths and each has dangers.
Realism, for Carr, offers a corrective to the wishful thinking of the interwar period. It is based on a study of history, recognizes the permanence of conflict, and prioritizes the national interest. Yet, a purely realist worldview is sterile, he warns. If politics is reduced to nothing but power, and if all ideals are dismissed as hypocrisy or manipulation, then there is no foundation upon which to build lasting peace or legitimate order. Realism alone leads to stagnation, domination, or despair.
On the other hand, utopianism brings ethical ambition and imaginative foresight into political life. It reminds us that the international system, while shaped by power, can still be improved through reason, cooperation, and reform. Yet utopianism, when unanchored from reality, is vulnerable to collapse. Carr argued that the idealist architects of the post-World War I order—however noble their intentions—ignored the real grievances of nations, misread the international mood, and placed excessive faith in institutions that lacked the means to enforce peace. In this sense, utopia without realism is blind.
Carr’s most enduring insight is that international relations is not a battle between truth and error, but a dynamic tension between power and principle. He called for a dialectical method—a way of thinking that moves between opposites in pursuit of a more complex and durable understanding of political reality. Realism provides the structure, the restraint, and the analytical clarity. Utopianism provides the direction, the ethical impulse, and the transformative potential. Only when these two forces are brought into creative tension can the world move toward an order that is both stable and just.
This dialectical vision sets Carr apart from more dogmatic realists and distinguishes his work as a foundational—not final—statement in international relations theory. He saw theory not as a fixed doctrine but as a conversation between competing insights. In doing so, he provided a model for political thought that resists absolutes, embraces contradiction, and constantly revises itself in light of both experience and aspiration.
E.H. Carr’s Enduring Contribution to International Relations
Edward Hallett Carr’s The Twenty Years’ Crisis remains a cornerstone of international relations theory not because it offers a final doctrine, but because it opened a space for honest and dynamic engagement with the complexities of global politics. Written on the eve of a second catastrophic world war, Carr’s work dismantled the intellectual certainties of his time and replaced them with a more grounded, if unsettling, understanding of international affairs.
At its core, Carr’s argument is a rejection of the illusion that politics—especially at the international level—can be governed purely by ideals. He exposes the myth of the “harmony of interests,” reveals the political function of international morality and law, and reminds us that power, in its various forms, is the unavoidable currency of diplomacy and statecraft. Yet Carr does not stop at critique. His call for a dialectic between realism and utopianism is a profound contribution: he recognized that while realism disciplines our expectations and forces us to confront uncomfortable truths, utopianism inspires us to reach beyond the limitations of the present.
Carr’s insights were forged in the interwar period, but they continue to resonate in the 21st century. In a world still shaped by power rivalries, failed institutions, selective moralism, and the tension between national interests and global ideals, Carr’s writing remains sharply relevant. His legacy lies not in providing definitive answers, but in teaching us how to think politically—with skepticism, with historical awareness, and with a measured sense of possibility.
Carr showed that international order is not simply imposed or imagined; it is negotiated through struggle, shaped by power, and legitimized through compromise. In doing so, he laid the intellectual groundwork for modern realism, but also carved out space for a realism that is reflective, not ruthless; pragmatic, not cynical; and always in search of balance between what is and what ought to be.
Bibliography
- Carr, E. H. The Twenty Years’ Crisis, 1919–1939: An Introduction to the Study of International Relations. London: Macmillan, 1939. Reissued with an introduction by Michael Cox. New York: Palgrave Macmillan, 2001.
- Cox, Michael. “Introduction to the 2001 Edition.” In E. H. Carr, The Twenty Years’ Crisis, 1919–1939, pp. ix–lxxi. New York: Palgrave Macmillan, 2001.
- Haslam, Jonathan. The Vices of Integrity: E.H. Carr, 1892–1982. London: Verso, 1999.
- Wilson, Peter. “Carr and the Historical Approach to International Relations.” In International Relations Theory for the Twenty-First Century: An Introduction, edited by Martin Griffiths, pp. 38–47. London: Routledge, 2007.
- Schmidt, Brian C. The Political Discourse of Anarchy: A Disciplinary History of International Relations. Albany: State University of New York Press, 1998.
- Devetak, Richard. “Realism.” In The Globalization of World Politics: An Introduction to International Relations, edited by John Baylis, Patricia Owens, and Steve Smith, 6th ed., pp. 85–99. Oxford: Oxford University Press, 2014.