Cover of Henry Kissinger’s Diplomacy, used as the shared image for this summary series.
In 1994, Henry Kissinger published the book Diplomacy. He was a renowned scholar and diplomat who served as the United States National Security Advisor and Secretary of State. His book provides an extensive sweep of the history of foreign affairs and the art of diplomacy, with a particular focus on the 20th century and the Western World. Kissinger, known for his alignment with the realist school of international relations, inquires into the concepts of the balance of power, raison d'État, and Realpolitik across different eras.
His work has been widely praised for its scope and intricate detail. Yet, it has also faced criticism for its focus on individuals over structural forces, and for presenting a reductive view of history. Also, critics have also pointed out that the book focuses excessively on Kissinger's individual role in events, potentially overstating his impact. In any case, his ideas are worthy of consideration.
This article presents a summary of Kissinger's ideas in the second chapter of his book, called "The Hinge: Theodore Roosevelt or Woodrow Wilson".
You can find all available summaries of this book, or you can read the summary from the previous chapter of the book, by clicking these links.
The Early Republic’s Combination of Interest and Principle
Kissinger begins by showing that American exceptionalism was never as simple as a rejection of power. In the early Republic, American leaders used European rivalries with considerable skill because the country’s immediate national interest was survival. The United States could remain independent so long as France and Great Britain checked one another. Its neutrality during the French Revolutionary and Napoleonic wars reflected that calculation. Jefferson’s description of France as a land tyrant and Britain as an oceanic tyrant made both belligerents morally equivalent, but the practical effect was strategic: neutrality preserved room for maneuver and increased American bargaining power.
At the same time, the United States never allowed its hostility to Old World diplomacy to prevent territorial expansion. Through treaties after 1794, it improved its position along Canada and Florida, opened the Mississippi to commerce, and strengthened trade in the British West Indies. The Louisiana Purchase of 1803 then gave the United States an immense territorial base west of the Mississippi and helped create the conditions for great-power status. Napoleon explained the sale in classic balance-of-power terms, imagining that he had given Britain a future maritime rival. American statesmen accepted the benefit without accepting the European rationale, since they treated expansion across North America as an internal national development rather than a foreign-policy problem.
That distinction allowed American leaders to combine moral condemnation of war with a determined pursuit of continental power. Madison denounced war as the source of armies, taxes, and instruments of domination. Monroe defended expansion because territory increased the country’s resources, population, and security. In Kissinger’s interpretation, the United States could maintain this duality because geography gave it a margin of safety unknown to European states. European powers formed coalitions against potential changes in the balance because their survival could be threatened by possibilities; the United States, protected by distance and growing strength, could wait until a danger became actual.
Washington’s warning against permanent alliances emerged from this geopolitical position, but Americans came to treat it as a moral principle. The oceans that separated the United States from Europe were interpreted as evidence of providence rather than as a strategic advantage. Consequently, Americans often attributed their freedom from European entanglements to superior moral insight. This was the basis of a recurring American belief: Europe suffered from war because its governments and diplomatic methods were corrupt, while the United States embodied a political order that could point toward a more peaceful world.
Kissinger traces this belief through Jefferson and Paine. Jefferson argued that nations and individuals should be judged by the same ethical system. Paine treated war as the product of false systems of government rather than the natural hostility of peoples. From this premise came the durable American idea that democracy encourages peace. Hamilton had challenged that assumption by noting that republics in antiquity and constitutional Britain had fought frequent wars, yet his skepticism remained marginal. Most American leaders believed the United States had a special duty to advance liberty, even when they disagreed about whether the duty required active promotion abroad or merely the example of a successful republic at home.
The early answer favored example over crusade. Jefferson imagined the United States as a working demonstration of republican self-government, a “standing monument” rather than an armed missionary. Even so, Kissinger emphasizes the ambivalence this created. The United States rejected the European claim that state necessity could justify conduct forbidden to individuals, but it also wanted the benefits of power and expansion. Robert Tucker and David Hendrickson’s formulation of Jeffersonian statecraft captures the dilemma. America wanted to renounce the traditional means of power while retaining the ambitions those means usually served. By about 1820, the compromise was to condemn European balance-of-power politics across the oceans while treating expansion across North America as manifest destiny.
The Monroe Doctrine and Continental Hegemony
The Monroe Doctrine gave this compromise its most important diplomatic form. John Quincy Adams expressed the older restraint in 1821 when he said that the United States wished freedom well everywhere but did not go abroad seeking “monsters to destroy.” Yet the other side of that restraint was a determination to keep European power politics out of the Western Hemisphere. The doctrine emerged from the crisis caused by the Holy Alliance’s effort to suppress revolution in Spain and from the possibility that European powers might move against Spain’s former colonies in Latin America.
British Foreign Secretary George Canning proposed joint Anglo-American action to prevent European control over Latin America. Adams understood the British purpose but distrusted British motives, especially so soon after the War of 1812. He therefore urged Monroe to act unilaterally. The result was a doctrine that extended Washington’s separation from Europe into a reciprocal rule: the United States would avoid European wars, and Europe must avoid the affairs of the Americas. Since Monroe defined American affairs as the whole Western Hemisphere, the doctrine was expansive from the start.
Although the United States lacked the military power to enforce the doctrine alone, Britain’s navy gave it practical backing. That fact allowed the United States to enjoy the strategic benefit without admitting dependence on British power. Under the doctrine’s umbrella, America could expand its commerce, influence, and territory while still insisting that it did not practice power politics. In Kissinger’s compressed formulation, American foreign policy in the nineteenth century was often a refusal to have a foreign policy. The United States could prevail over Native peoples, Mexico, and Texas. It treated those actions as part of national development rather than diplomacy.
Over the century, the Monroe Doctrine moved from a warning against European intervention into a justification for American predominance in the hemisphere. Polk invoked the possibility that Texas might fall under the influence of a stronger foreign power, which meant that the doctrine could be used against hypothetical future dangers as well as actual ones. The Civil War temporarily interrupted the expansionist pattern because Washington’s priority became preventing European recognition of the Confederacy. Recognition would have created a multistate North American system and imported the balance-of-power politics the United States had tried to exclude. After the war, expansionist arguments returned, including the justification of the Alaska purchase as a way to reduce foreign control near American territory.
Meanwhile, the material basis of American power changed dramatically. By 1885, the United States had surpassed Britain in manufacturing output, and by the turn of the century it consumed more energy than Germany, France, Austria-Hungary, Russia, Japan, and Italy combined. Industrial output, railways, agricultural production, and population all grew at extraordinary rates. Kissinger stresses that no nation had ever gained such power without eventually seeking wider influence. Yet for a time the Senate blocked expansionist schemes, kept the army small, and left the navy weak. Other powers still treated Washington as secondary, even though the material balance had already shifted.
That restraint could not last. In the late 1880s, the United States began building a modern navy, while Alfred Thayer Mahan provided the intellectual case for sea power. Ironically, British naval supremacy had protected the United States during much of the nineteenth century, but Americans often saw Britain as the main strategic challenge. As American confidence grew, Washington used the Monroe Doctrine to push Britain out of the hemisphere. Richard Olney’s 1895 assertion that the United States was “practically sovereign” on the continent revealed how far the doctrine had evolved. By 1902, Britain had abandoned a major role in Central America, and the United States stood as the dominant power in its own region.
Roosevelt’s Great-Power Realism
Theodore Roosevelt gave the clearest expression to the new global implications of American power. He accepted the traditional belief that the United States had a beneficent role, but he rejected the idea that it could fulfill that role by example alone. In his view, the United States was a great power like others, with interests that extended beyond non-entanglement. When those interests clashed with those of other states, it had both the right and the duty to use strength.
Roosevelt’s first arena was the Western Hemisphere. His 1904 corollary to the Monroe Doctrine claimed an American “international police power” in cases of disorder or impotence. The practice had already begun. The United States pressured Haiti over debts, encouraged Panama’s break from Colombia and secured the Canal Zone, and created a financial protectorate in the Dominican Republic. It also occupied Cuba. For Roosevelt, these actions were not departures from America’s role but expressions of it. The oceans no longer provided sufficient insulation, and the United States had to help police an increasingly interconnected world.
Kissinger treats Roosevelt as almost unique among American presidents because he defined the national interest in terms of power equilibrium. He did not believe that peace was the normal condition of mankind, that public morality and private morality were identical, or that the United States could remain safe by relying on its virtue. His view of international life was closer to Palmerston, Disraeli, Bismarck, and other European statesmen than to Jefferson. He distrusted international law when it lacked force, opposed disarmament that would weaken civilized powers while leaving despots armed, and mocked peace treaties or world-government schemes unsupported by military capacity. For him, “righteousness” without force could be as dangerous as force without righteousness.
This outlook also made Roosevelt comfortable with spheres of influence. He accepted Japan’s domination of Korea because Korea could not defend its treaty rights and no other power would enforce them. He viewed such outcomes through the distribution of power rather than legal formalities. In Europe, he initially assumed the balance of power was largely self-regulating, but he gradually saw Germany as the principal threat and began to identify American interests with Britain and France. During the Algeciras Conference over Morocco in 1906, he subordinated modest American commercial interests to a geopolitical alignment with the British and French against German pressure.
In Asia, Roosevelt favored Japan as a counterweight to Russia but did not want Russia destroyed as a balancing factor. During the Russo-Japanese War, he leaned toward Japan because Russian victory would have strengthened a power he considered dangerous. Once Japan achieved dramatic success, however, he sought a settlement that would restrain Japanese predominance as well. The Portsmouth peace preserved a Far Eastern equilibrium and won him the Nobel Peace Prize, ironically for a settlement based on principles later Wilsonian Americans would treat as suspect.
Roosevelt applied the same logic to the First World War. At first he viewed Germany’s violation of Belgian and Luxembourg neutrality with clinical detachment, seeing small states as likely casualties when great powers struggled. Soon he shifted his emphasis from legality to strategic danger. If Germany defeated Britain, destroyed British naval supremacy, and dominated Europe, it might challenge American security and influence in the Western Hemisphere. For that reason, Roosevelt urged rearmament and American support for the Entente. His preference for British sea power over German hegemony rested partly on culture and historical experience. The core argument was geopolitical: the United States could not tolerate a hostile power controlling the resources of Europe.
Roosevelt’s difficulty was political. He could diagnose the balance of power more accurately than most American leaders, but he could not persuade Americans to enter war on those grounds. The United States had not developed either the habits or the vocabulary of European power politics. Its citizens did not think of their country as one power among others, making calculations in a morally neutral system. Roosevelt had a statesman’s understanding of international mechanics; Wilson had a prophet’s understanding of American motivation.
Wilson’s Moral Internationalism
Wilson prevailed because he translated international engagement into the language of American exceptionalism. He entered national politics late and became president partly because the Republican split between Taft and Roosevelt opened the way. Once in office, he grasped that isolationism could be overcome only by showing that involvement abroad served America’s ideals rather than selfish interests. He therefore led the United States toward war by first proving his devotion to neutrality and then presenting intervention as a sacrifice for universal principle.
In his first State of the Union address, Wilson sketched the foundations of Wilsonianism. International order, in his view, should rest on law, arbitration, and honor. Roosevelt found such ideas dangerous when they were not backed by power. Wilson, by contrast, regarded rearmament after the outbreak of the European war as a sign that the United States had lost its composure. The war’s causes, he argued, did not touch America directly, and neutrality gave the United States the chance to render disinterested service as mediator.
Kissinger rejects the view that Wilson’s neutrality was simple isolationism. Wilson was universalizing American values. His assumptions came from the older American tradition: the United States had a mission beyond normal diplomacy, democracies were more peaceful because ordinary people desired peace, foreign policy should obey the moral standards of individual conduct, and the state could not claim a separate ethical code. Wilson added to these assumptions a sweeping claim of altruism. America, he insisted, threatened no nation and coveted no possession, and therefore could lead because its purposes were unselfish.
To Kissinger, this claim was unprecedented and double-edged. Other nations justified leadership by linking their interests to those of others; Wilson justified it by denying selfish motive. Such altruism could inspire Americans, but it could also make American action unpredictable to foreign leaders, because the national interest can be calculated while altruism depends on the actor’s own definition of virtue. Wilson intensified the claim by treating the United States as providentially chosen: a continent had been preserved for a peaceful people devoted to liberty. This moved American foreign policy far beyond Roosevelt’s aim of taking a responsible place in the balance of power. Roosevelt wanted the United States to become a major power among major powers; Wilson treated it as the bearer of principles applicable to all mankind.
By 1915, Wilson had advanced a doctrine whose implications were global. The security of the United States, he suggested, was inseparable from the security of peoples everywhere who sought liberty and self-government. Kissinger sees here an anticipation of later containment thinking: America could not confine its concern to events directly affecting itself. Wilson even reinterpreted Washington’s warning against foreign entanglements. According to Wilson, Washington had warned against entanglement in the purposes of other governments, not against concern for humanity. Since nothing affecting humanity could be foreign to America, a doctrine originally meant to limit involvement became, in Wilson’s hands, a charter for engagement.
The immediate causes of American entry into the war were Germany’s sinking of the Lusitania and its renewal of unrestricted submarine warfare. Wilson, however, did not rest the declaration of war on those grievances. He also avoided arguments centered on Belgium or the balance of power. He cast the war as a moral struggle for democracy, small nations, popular self-government, and a universal order of right. Because the war aims were moral, compromise became difficult. Roosevelt would probably have framed intervention in strategic terms and left room for a settlement based on interests; Wilson defined the conflict so that peace required the defeat of a political evil.
This logic pushed Wilson beyond his earlier call for “peace without victory.” Once America entered the war, he separated the German people from their rulers and made autocratic government itself the problem. European statesmen had worried about Kaiser Wilhelm II, but they had not made the overthrow of Germany’s domestic order the key to European peace. Wilson’s language turned the war into a struggle to make the world safe for democracy, and American opinion quickly absorbed the moral categories. The Fourteen Points came closest to a detailed program, but Kissinger places the deeper historical achievement elsewhere: Wilson recognized that Americans would sustain a major international role only when it was justified by moral faith.
Collective Security and the Triumph of Wilsonianism
Wilson’s postwar project rejected the old balance of power as a system of “organized rivalries.” In its place, he proposed a “community of power,” later known as collective security. The idea assumed that peace-loving nations shared an equal interest in resisting aggression. They would unite against any state that disturbed the peace. The League of Nations was the institutional expression of that idea. It would substitute shared moral judgment and collective enforcement for alliances and secret calculations.
Kissinger stresses how radical this proposal was for Europe. For three centuries, European states had based order on the balancing of national interests and had treated security as the first task of foreign policy. Wilson asked them to base policy on moral conviction and to trust that security would follow. He further demanded the reduction or destruction of arbitrary power anywhere it could threaten world peace. The League would act as a trustee of peace, with crises exposed to the clarifying pressure of world opinion. To nations exhausted by war and trained by centuries of insecurity, this was philosophically alien and practically demanding.
Yet Wilson’s vocabulary became the common language of American foreign policy. Later debates often concerned whether the United States had lived up to Wilson’s principles rather than whether those principles provided sufficient guidance. Kissinger is sharply critical of the premise of collective security. It assumes that all states will identify threats in the same way and accept comparable risks to resist them. In practice, this happens only when a danger is overwhelming and widely recognized. Kissinger points to the world wars and, regionally, the Cold War as examples. In difficult cases, states usually disagree about the threat, the remedy, or the sacrifice required. From Italy’s attack on Abyssinia to the Bosnian crisis, collective security proved far easier to proclaim than to apply.
Wilsonianism also deepened a split in American thought. Was the United States defending concrete security interests, or was it resisting only illegal methods of change? Did it reject geopolitics altogether, or reinterpret geopolitics through moral categories? Kissinger notes that even in the Gulf War, President George H. W. Bush emphasized resistance to aggression more than the defense of vital oil supplies. During the Cold War, American debates sometimes turned on whether a flawed America had the moral standing to organize resistance to Moscow. These arguments flowed from Wilson’s habit of filtering security through legality and morality.
Roosevelt would have rejected the entire structure of assumption. He believed peace was fragile rather than natural. It could be maintained only by vigilance, arms, and alliances among like-minded powers. He feared that a league promising too much would leave the peaceful exposed to the predatory, like sheep dismissing their watchdogs before facing wolves. To him, a world organization might do limited good if modestly conceived, but grand claims would make it resemble the Holy Alliance in another moralized form. His vision died with him in 1919. No major American school of foreign policy later took him as its explicit founder. Some later presidents practiced elements of his realism; Nixon, in Kissinger’s telling, embodied many Rooseveltian precepts while still claiming Wilson’s internationalism.
Wilson’s intellectual victory endured despite the League’s political failure in the United States. The country was not yet ready for the permanent global role Wilson imagined, but his principles shaped later American explanations of that role. After the Second World War, the United States helped build the United Nations on principles resembling the League’s, initially hoping that the victors’ cooperation could sustain peace. When that hope collapsed, America framed the Cold War less as a rivalry between superpowers than as a moral struggle for democracy. After communism fell, both major parties returned to the Wilsonian belief that peace depended on collective security and the spread of democratic institutions.
Kissinger closes by presenting Wilsonianism as the central drama of America’s world role. The United States has often been domestically satisfied with the status quo, yet its foreign-policy ideology has been revolutionary because it treats the spread of its principles as a condition of peace. It tends to turn international disputes into struggles between good and evil, which makes compromise and inconclusive outcomes emotionally difficult. It trusts law and peaceful change, yet history has often produced major change through violence. America therefore had to pursue universal ideals in cooperation with states that had narrower margins of survival, more limited aims, and less confidence in providence. Even so, it persevered. The postwar world became largely an American creation: not Roosevelt’s equilibrium of powers, but Wilson’s vision of America as a beacon and a hope.
You can read the summary of the next chapter of the book by clicking this link.