The cover image anchors this chapter summary in Kissinger’s larger study of diplomacy and international order.
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 ninth chapter of his book, called "The New Face of Diplomacy: Wilson and the Treaty of Versailles".
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 War That Outgrew Traditional Diplomacy
Kissinger begins with the contrast between the hopes expressed at the Armistice of November 11, 1918, and the catastrophe that followed within a generation. Lloyd George could speak as though the conflict had ended war itself, but the peace emerged from the same forces that had made the war so destructive. The belligerents had expected a short campaign and assumed that a familiar diplomatic congress would settle the terms afterward. Instead, the scale of the casualties transformed the meaning of the war. The original disputes over influence in the Balkans, Alsace-Lorraine, and naval rivalry were displaced by a moralized conviction that the enemy itself was evil and had to be defeated rather than bargained with.
According to Kissinger, the older European order might have produced a compromise peace by the spring of 1915, after both sides had discovered the futility of their first offensives. Yet mass sacrifice made compromise politically impossible. The same dynamic that had let mobilization timetables overrun diplomacy in 1914 now let the memory of slaughter overrun statesmanship. France would not abandon Alsace-Lorraine, and Germany would not consider surrendering conquered territory. Because each side sought new allies with promises of future spoils, every diplomatic opening became harder to exploit. Italy, Romania, and Bulgaria entered the conflict with their own claims, further reducing the room for settlement.
The war therefore ceased to be a cabinet war in the older European sense. It began with diplomatic notes, telegrams among monarchs, and decisions by chancelleries, but it quickly became a war of mobilized societies. Its political language also changed. Allied slogans about ending all wars and making the world safe for democracy implied the disarmament of Germany and the transformation of German and Austrian institutions. Germany’s terms were equally incompatible with equilibrium. In the West, German leaders sought military control over Belgium, access to Antwerp, and the annexation of northern French coal fields. In the East, they promised a Polish monarchy in 1916, then imposed the Treaty of Brest-Litovsk on Russia in March 1918, annexing a vast portion of European Russia and turning Ukraine into a protectorate.
Great Britain’s stance reflected a major change in the older balance-of-power tradition. Before 1914, Britain had usually identified its security with preventing any continental hegemon. By the time of the war, British leaders concluded that Germany had grown too powerful for a return to the prewar status quo to be safe. Foreign Secretary Edward Grey therefore rejected an early German feeler over Belgium because Britain wanted guarantees against another German attack. In practice, that meant a permanent weakening of Germany, particularly at sea, which Germany would never accept without defeat.
The result was that both sides came to demand terms equivalent to unconditional surrender. Germany defeated Russia and gravely weakened France and Britain, but the Western Allies, with decisive American support, ultimately defeated Germany. Kissinger treats this double outcome as crucial. The old Eastern Courts collapsed, Austria-Hungary disappeared, and Bolshevik Russia temporarily withdrew from the European balance. Germany then passed through defeat, revolution, inflation, depression, and dictatorship. France and Britain survived, but their victory left them exhausted. They had destroyed the old imperial framework without gaining the strength or unity needed to create a stable replacement.
Wilson’s New Diplomacy
The United States entered this wreckage with power, confidence, and an idealism foreign to European statecraft. Kissinger emphasizes that American participation made total victory technically possible, but also shifted the declared purpose of the war. Wilson rejected the balance of power and regarded Realpolitik as morally corrupt. In place of equilibrium, he advocated democracy, collective security, and self-determination. None of these principles had founded previous European settlements.
Wilson’s program rested on assumptions very different from those of European diplomacy. In the American view he represented, democratic peoples were naturally peaceful, and self-determination would remove the grievances that led populations to oppress others or fight wars. Once nations enjoyed democracy and peace, they would join together to defend those gains. European statesmen had been trained by a darker tradition. Their institutions and alliances assumed that states were prone to ambition and conflict, and diplomacy existed to discourage or balance that tendency. Borders had long been adjusted to preserve equilibrium, even when populations preferred another arrangement.
This difference explained Wilson’s hostility to the European practice of treating small peoples as components of a larger balance. Britain and Austria had once resisted the breakup of the Ottoman Empire because they feared that small successor states would be weak, vulnerable to ethnic conflict, and open to Great Power manipulation. France had been blocked from annexing French-speaking Wallonia, and Germany had been discouraged from uniting with Austria, because equilibrium took precedence over national preference. Wilson rejected that logic. In his view, the denial of self-determination caused war, while the pursuit of balance perpetuated it.
The League of Nations became Wilson’s proposed institutional answer. Ironically, Kissinger notes that the idea first reached him through Britain, the traditional defender of balance-of-power diplomacy. In 1915, Grey raised the possibility of an association of states that would enforce disarmament and peaceful settlement. Britain was trying to draw the United States into a war fought for older strategic reasons, but Grey understood Wilson’s convictions and offered them a form that Wilson could adopt as his own. Kissinger treats the exchange as an early example of the Anglo-American “special relationship,” in which British leaders could influence American policy in ways that seemed native to Washington.
Wilson developed the idea into an explicitly American doctrine. By 1917, he advocated American participation in a universal association and even presented the Monroe Doctrine as a model for global order. Kissinger highlights the irony, since the United States had expanded at Mexico’s expense and had recently intervened there. Nevertheless, Wilson believed that the war could create a worldwide rule against territorial expansion, entangling alliances, and power competition. He also expected American financial power, after April 1917, to force the Allies toward his vision once the war ended.
The Fourteen Points of January 8, 1918, gave Wilson’s program its famous form. The first eight turned Wilson’s general ideals into procedural restraints: open diplomacy, freer trade, disarmament, and the League were meant to curb secret bargaining and coercive power politics. Six further goals were phrased more conditionally and dealt with territorial settlements in Europe and the Near East. Kissinger sees in this division an early weakness in Wilson’s design: several “desirable” provisions could not be reconciled cleanly with self-determination.
Wilson’s language toward Germany also departed from traditional war aims. He presented the war as a campaign to bring Germany into a community of justice and law rather than as a struggle to impose specific geopolitical terms. Kissinger’s interpretation is that Wilson treated the war as an act of conversion more than a contest over power. Wilson later condemned the balance of power as the old order responsible for conflict. Kissinger replies that Europe’s problem before 1914 had been the improper abandonment of balance, as the prewar system became rigid, bipolar, and captive to nationalist public opinion.
France’s Security Problem
Wilson had identified a real twentieth-century challenge: how to put power in the service of peace. Yet Kissinger argues that Wilson’s solution misread the causes of conflict. Competition among states did not arise only from denied self-determination or economic rivalry. It also came from ambition, aggrandizement, and the interests of rulers and ruling groups. Collective security required states to judge aggression morally and act against it collectively, regardless of their particular interests. European leaders understood alliances tied to concrete threats. They had little confidence in a system that asked all states to interpret justice the same way.
Before American entry, Britain and France avoided a direct confrontation with Wilson over war aims because they needed the United States. After the Russian Revolution and Brest-Litovsk, they feared German victory and could not afford to alienate their new partner. After the Armistice, they were too exhausted and still too dependent on American power to risk a breach. France especially found itself in a tragic position. It had fought for survival and lost a generation. It also knew more clearly than its allies that Germany remained stronger in population, industry, and strategic potential.
Kissinger gives demographic and economic evidence to show why French fear was not mere hysteria. France’s share of Europe’s population had fallen from 15.7 percent in 1880 to 9.7 percent in 1900. In 1920, France had 41 million people, while Germany had 65 million. The economic disparity was equally severe. Germany had surpassed France in steel, coal, and iron by 1880, and in 1913 Germany produced 279 million tons of coal to France’s 41 million. France had won the war but could not by itself contain the defeated enemy.
This was the essential contrast between Vienna and Versailles. After Napoleon’s defeat, France remained powerful, but the victors stayed united and created the Quadruple Alliance. That coalition deterred French revisionism while allowing France to reenter the Concert of Europe. After 1918, the victors did not remain united. The United States withdrew, Soviet Russia was outside the settlement, and Britain was uncertain about supporting France. Because Germany remained potentially stronger than any single continental opponent, France needed either a continued coalition, the partition of Germany, or a genuine reconciliation. None of these options proved available.
France therefore sought measures that its allies considered excessive but that French leaders regarded as elementary. One possibility was to break Germany back into component states or detach the Rhineland as a buffer. Yet Bismarck’s unification had created a German national consciousness too strong to undo easily, and Wilson would not accept so direct a violation of self-determination. Another possibility was a treaty guarantee by the United States and Britain. But that specific commitment conflicted with Wilson’s new diplomacy and with American domestic limits. The final settlement was shaped by an unresolved bargain: Wilson accepted punitive modifications to the Fourteen Points in order to secure the League, while France accepted less security than it wanted in the hope of obtaining an American commitment. Germany was not reconciled, France was not secure, and the United States eventually withdrew.
Paris and the League of Nations
The Paris Peace Conference, meeting from January to June 1919, intensified these contradictions. Wilson was its dominant figure, but Kissinger criticizes his decision to attend personally for months. A head of state who handles details risks becoming trapped in subordinate issues while his domestic position deteriorates at home. Wilson’s absence from Washington weakened his standing in Congress, which later mattered when the treaty required ratification. At Paris, the longer he remained, the more urgency diluted his effort to create a new order.
The conference itself encouraged fragmentation. Unlike the Congress of Vienna, it excluded the defeated powers. Germany waited under uncertainty and clung to the Fourteen Points as though they guaranteed leniency. Russia denounced the conference from outside as a capitalist exercise hostile to the Bolshevik regime. The settlement therefore omitted the two strongest powers in Europe, Germany and Russia, which together contained the largest military potential on the continent. For Kissinger, that exclusion alone gravely weakened the prospects for stability.
The procedures of the conference also worked against an overarching design. The Big Four—Wilson, Clemenceau, Lloyd George, and Vittorio Orlando—were dominant, but the conference included twenty-seven states, several councils, and fifty-eight committees. Peripheral disputes consumed time, while the central question remained unresolved: what role would Germany have in the future order? In theory, collective security and self-determination supplied the concept. In practice, the conference became a struggle between Wilson’s legal-moral vision and France’s demand for concrete security.
Wilson treated the League as both an enforcer of peace and a future mechanism for correcting the treaty’s injustices. He believed that boundaries and terms could later be adjusted through reasoned procedures once wartime passions had cooled. However, this view required faith that public opinion, economic boycott, and moral pressure could substitute for military guarantees. European states had no experience of such mechanisms working in a crisis, and France had no margin for error.
For France, the League had one useful purpose: to trigger military assistance against Germany. French leaders doubted that all nations would identify aggression in the same way or respond to it with the same urgency. The United States and Britain could retreat behind oceans and fleets if collective security failed. France could not. Léon Bourgeois therefore pressed for an international army or automatic enforcement machinery, but Wilson’s advisers knew that the United States Senate would never accept such a commitment. Wilson returned to trust, good faith, and the moral force of world opinion. Article 10 of the Covenant consequently promised that the League Council would advise on how territorial integrity should be preserved, leaving action dependent on future agreement.
France considered this inadequate and returned to its demand for a Rhineland buffer. When the United States and Britain resisted dismembering Germany, they offered a substitute guarantee of the settlement. In theory, this resembled the post-Napoleonic alliance against French revisionism. In practice, Kissinger stresses the crucial difference: after 1815, the allies believed the French threat was real and were prepared to act together; after 1919, Britain and the United States offered France a guarantee largely to induce it to abandon the Rhineland demand. Wilson’s own advisers saw the guarantee as a contradiction of the League. If the League worked, the guarantee was redundant; if the guarantee was necessary, the League was inadequate. The United States Senate refused to ratify the treaty, Britain used that refusal to drop its own commitment, and France’s concession on the Rhineland remained while the guarantee vanished.
The Terms of Versailles
The Treaty of Versailles emerged from these crosscurrents and was signed in the Hall of Mirrors, a site freighted with symbolic humiliation because Bismarck had proclaimed the German Empire there in 1871. Kissinger’s judgment is that the treaty was too punitive to reconcile Germany and too lenient to prevent its recovery. It forced exhausted democracies to maintain permanent vigilance against a defeated but revisionist power, without giving them either the unity or confidence required for enforcement.
Despite Wilson’s principles, the treaty imposed penalties across territory, military affairs, colonies, and the economy. Germany lost 13 percent of its prewar territory. Alsace-Lorraine returned to France, Eupen-et-Malmédy went to Belgium, and Poland received Upper Silesia, Posen, and access to the Baltic through the Polish Corridor, which separated East Prussia from the rest of Germany. These arrangements reflected strategic and national claims more than a consistent application of self-determination.
Germany also lost its colonies. Wilson objected to simple annexation by the victors, while Britain, France, and Japan wanted shares of the spoils. The compromise was the Mandate system, under which former German colonies and Ottoman territories were assigned to victorious powers under League supervision, supposedly to prepare them for independence. Kissinger treats the arrangement as ingenious but hypocritical. Its meaning was never clearly defined, and it did not bring independence more rapidly than ordinary colonial rule.
The military clauses reduced the German army to 100,000 volunteers and limited the navy. They also prohibited submarines, aircraft, tanks, and heavy artillery while dissolving the general staff. Economic clauses added further burdens. Germany had to make immediate payments, supply coal to France, and surrender much of its merchant fleet to Britain. It also lost foreign assets and patents, accepted tariff limits, and allowed major rivers to be internationalized. Reparations were especially destabilizing because the treaty required Germany to compensate civilians.
These provisions revealed the compromised character of the peace. The victors claimed to be inaugurating a new era and tried to avoid the perceived mistakes of Vienna. Yet Kissinger argues that they produced a fragile mixture of American utopianism and European fear. The settlement was too conditional to realize Wilson’s hopes and too tentative to satisfy French security needs. A system preserved only by force is precarious, and Versailles required force from Britain and France at the very moment when those two powers were divided over how much enforcement was desirable.
Self-Determination and the Eastern Vacuum
The practical application of self-determination proved especially difficult in the lands of the former Austro-Hungarian Empire. Czechoslovakia included millions of Germans, Hungarians, and Poles, leaving nearly a third of its population neither Czech nor Slovak. Yugoslavia satisfied the aspirations of South Slavic intellectuals, but it joined peoples divided by the older frontier between Western and Eastern Christendom, Catholic and Orthodox traditions, and Latin and Cyrillic scripts. Romania gained millions of Hungarians, and Poland gained millions of Germans as well as the corridor separating East Prussia from Germany proper. In the name of self-determination, nearly as many people remained under foreign rule as under Austria-Hungary, but now they were distributed among weaker and more mutually hostile states.
Lloyd George later understood the danger: a vigorous German people surrounded by fragile states containing large German minorities would have powerful incentives for revision. By the time this became clear, the conference had advanced too far, and no accepted alternative remained because the balance of power had been morally discredited. Kissinger rejects the later German claim that Germany had been tricked by the Fourteen Points. Germany had ignored Wilson’s principles while victory still seemed possible and had imposed a harsh peace on Russia at Brest-Litovsk. When Germany asked for an armistice, it did so because its defenses were breaking and the American army made defeat inevitable. In Kissinger’s view, Wilson’s principles actually spared Germany from harsher punishment.
The deeper failure was structural. The Congress of Vienna had rested on three pillars: a conciliatory peace with the defeated power, a balance of power capable of restraining revisionism, and a shared sense of legitimacy among the principal states. Versailles possessed none of them. Its terms were too harsh for reconciliation and insufficient for permanent subjugation. France could not build a firm anti-German coalition because Britain and the United States refused binding commitments and Russia had withdrawn from the European balance. It could not partition Germany because the same powers opposed the policy. It could not conciliate Germany because the treaty and French public opinion made that impossible.
Versailles also worsened the geopolitical situation it was meant to solve. Before 1914, Germany faced strong powers to both east and west: France, Austria-Hungary, and Russia. After 1919, Austria-Hungary was gone, Russia was revolutionary and separated from Germany by new states, and France was weakened. Poland created a particular strategic problem. France needed an eastern ally capable of forcing Germany into a two-front war, and only Russia was strong enough to play that role. But an independent Poland stood between Germany and Russia, so Russia could pressure Germany only by violating Poland. Poland itself was too weak to replace Russia. The treaty thereby gave Germany and Russia an incentive to partition Poland two decades later.
France tried to compensate by supporting the new states of Eastern Europe and encouraging them to extract territory from Germany or Hungary. These states had every reason to encourage French illusions, but they could not replace Russia and Austria as pillars of balance. They were internally divided, mutually suspicious, and exposed to both German and Russian revisionism. Thus the burden of European stability fell on France, even though France lacked the strength, confidence, and allies to police the continent. America returned to isolation, Russia was outside the system, and Britain was unwilling to underwrite French security on French terms.
Legitimacy, Guilt, and the Failure of Enforcement
Kissinger identifies the psychological weakness of Versailles as its most dangerous flaw. The Vienna settlement had worked because the powers needed to defend it also considered it legitimate. Versailles extolled values that conflicted with the incentives required to enforce it. Many states expected to uphold the treaty regarded it as unjust in some respect. The war had been fought to curb German predominance, but Wilsonian principles inhibited a straightforward peace based on reducing German power. Because the victors would not justify the settlement by conquest or balance-of-power necessity, they had to justify German disarmament as the first step toward general disarmament and reparations as punishment for guilt.
This logic undermined enforcement. Germany could claim discrimination and demand either the right to rearm or the disarmament of others to its level. At disarmament conferences, Germany often gained the moral advantage, frequently with British sympathy. If France accepted German equality in armaments, Eastern Europe could not be defended. If France disarmed to Germany’s level, France itself would become vulnerable. The treaty’s own language therefore pushed toward either German rearmament or French demoralization.
The same problem appeared in the treaty’s treatment of German national claims. The prohibition against union between Austria and Germany violated self-determination, as did the large German minorities in Czechoslovakia and Poland. German irredentism could therefore invoke the organizing principle of the settlement against the settlement itself. The democracies that had proclaimed self-determination felt increasing unease about enforcing exceptions to it.
Article 231, the War Guilt clause, added the gravest moral burden. It asserted Germany’s sole responsibility for the war and supplied the moral basis for many punitive measures. Kissinger contrasts this with eighteenth-century peacemaking, which treated wars as the result of clashing interests and imposed costs on defeated powers without needing to identify moral guilt. Versailles, shaped by Wilsonian moralism and wartime hatred, required an evil to punish. As passions cooled, especially in Britain during the 1920s, observers increasingly recognized that responsibility for the outbreak of the war was more complicated, even if Germany bore heavy responsibility. The more the victors questioned the fairness of Article 231, the less willing they became to enforce the treaty’s penalties. Germany, for its part, turned the clause into the “War Guilt Lie,” strengthening revisionist politics at home.
The framers of Versailles achieved the opposite of their purpose. They tried to weaken Germany physically, but they left it geopolitically stronger once the temporary shackles of disarmament could be cast off. They tried to create a moral order, but their settlement lacked a shared moral foundation. They tried to replace balance-of-power politics with collective security, but it had no automatic force and no agreement about threats. In Kissinger’s final interpretation, the new order did not transcend the old one. It damaged the old mechanisms without creating a workable substitute, leaving Europe with a peace that invited the very conflict it was meant to prevent.
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