Classical Realism

Certainly! Here’s an explanation of Classical Realism as it would be presented by a master’s student, complete with references and concrete examples drawn from international politics and theory.

🏛️ What is Classical Realism?

Classical Realism is one of the foundational theories of international relations (IR), rooted in the idea that the struggle for power is a fundamental feature of human nature, and therefore, of international politics. It emphasizes the permanence of conflict, the role of human nature, and the centrality of the state in an anarchic international system.

Unlike neorealism (which focuses on the structure of the international system), classical realism grounds its analysis in history, ethics, and human psychology.

🔑 Key Tenets of Classical Realism

🧠 Major Thinkers and Texts

1. Thucydides – History of the Peloponnesian War

   Thucydides’ account of the Melian Dialogue demonstrates how power overrides morality, as Athens justifies its domination over Melos by arguing that “the strong do what they can and the weak suffer what they must”—a timeless realist sentiment (Thucydides, 5th century BCE).

2. Niccolò Machiavelli – The Prince (1513)

   Argued that rulers must be pragmatic and sometimes unethical to maintain power and security. Machiavelli’s notion of “the ends justify the means” reflects realist reasoning (Machiavelli, 1513).

3. Thomas Hobbes – Leviathan (1651)

   Hobbes describes the state of nature as a condition of perpetual conflict (“war of all against all”), which parallels the anarchic international system in realist thought (Hobbes, 1651).

4. Hans J. Morgenthau – Politics Among Nations (1948)

   Often considered the father of modern classical realism, Morgenthau formulated a systematic theory based on six principles. He argued that politics is governed by objective laws rooted in human nature, and that the national interest defined in terms of power should guide foreign policy (Morgenthau, 1948).

🌍 Real-World Applications

🧨 The Cold War

• The U.S.–Soviet rivalry (1947–1991) is often analyzed through a classical realist lens:

  • Both superpowers acted to preserve and expand power in an anarchic world.

  • Despite ideological differences, each pursued its national interest, often supporting authoritarian regimes to counter the other’s influence.

  • The Cuban Missile Crisis (1962) reflects classical realist logic: leaders acted rationally under pressure, with power and survival overriding moral or ideological concerns.

🇮🇳 India and Realism

• India’s foreign policy under Jawaharlal Nehru initially emphasized idealism and non-alignment, but after the Sino-Indian War (1962), its approach became more realist—focusing on military preparedness, regional power projection, and strategic alliances when needed.

🔍 Criticism of Classical Realism

• Neglect of structure: Critics argue classical realism focuses too much on human nature and not enough on systemic forces (Waltz, 1979).

• Gender and ideology blind spots: Feminist and critical theorists argue it ignores how gender, race, and ideas shape international outcomes.

• Ethical ambiguity: It often normalizes war and power politics, potentially excusing immoral behavior by states.

📚 References

• Morgenthau, H. J. (1948). Politics Among Nations: The Struggle for Power and Peace. New York: Knopf.

• Thucydides. (5th century BCE). The History of the Peloponnesian War.

• Machiavelli, N. (1513). The Prince.

• Hobbes, T. (1651). Leviathan.

• Waltz, K. N. (1979). Theory of International Politics. Reading, MA: Addison-Wesley.

🧩 Summary Table

Would you like this compared directly to Neorealism or Constructivism next?

Certainly. Here’s a deeper and historically grounded explanation of the Melian Dialogue and how it shaped Classical Realism, including broader context, theoretical implications, and connections to modern realist thought.

🏛️ The Melian Dialogue and the Foundations of Classical Realism

The Melian Dialogue, recounted by Thucydides in The History of the Peloponnesian War (5th century BCE), is often regarded as one of the earliest and most powerful illustrations of classical realism in international relations. It provides a vivid account of power politics stripped of moral pretense, anchoring the idea that might, not right, determines political outcomes in a world without overarching authority—a notion that remains central to realism today.

⚔️ Historical Context: The Peloponnesian War

• The Peloponnesian War (431–404 BCE) was a prolonged conflict between the two leading Greek city-states: Athens and Sparta, and their respective allies.

• Athens had established a powerful maritime empire, using the Delian League as a vehicle for expanding its influence. Sparta led the Peloponnesian League, representing land-based oligarchies wary of Athenian expansion.

• By 416 BCE, the war had reached a volatile phase. The neutral island of Melos, ethnically Dorian like Sparta, refused to submit to Athenian demands to join its empire. It hoped to maintain neutrality and appealed to justice, hoping its kinship with Sparta would provide support.

🗣️ The Dialogue: Athens vs. Melos

Thucydides frames the Melian Dialogue as a staged diplomatic negotiation between Athenian envoys and Melian representatives. The Athenians, dismissing moral arguments, present a cold, strategic logic:

“The strong do what they can, and the weak suffer what they must.”

This one sentence encapsulates the realist worldview:

• International politics is governed not by justice or law, but by power asymmetries.

• Morality, neutrality, or kinship ties are irrelevant in the face of strategic interest.

• Anarchy (the absence of a global sovereign) makes self-help and power maximization the default state behavior.

The Melians insist on justice, divine favor, and hope of Spartan aid. The Athenians dismiss all three:

• Justice is only meaningful between equals.

• The gods favor the strong, and so do men.

• Sparta, they argue, acts in its own interest and will not save Melos.

⚔️ Outcome: The Siege of Melos

• The Melians refused to submit.

• Athens laid siege to the city, eventually capturing it.

• All Melian adult males were executed, and women and children sold into slavery.

• Athens then resettled the island with its own colonists.

This brutal episode underscored the logic of power unchecked by moral constraints—what Hans Morgenthau centuries later would describe as “interest defined in terms of power” (Morgenthau, 1948).

📚 Theoretical Implications: From Thucydides to Morgenthau

Thucydides’ account is not just history; it is political philosophy. The Melian Dialogue functions as a didactic text, showing the consequences of ignoring power realities.

🧠 Key Classical Realist Ideas Demonstrated:

🧠 Morgenthau’s Classical Realism:

• Morgenthau (1948) argued that politics, like society in general, is governed by objective laws rooted in human nature—especially the desire for power.

• He criticized moral absolutism and idealist thinking in international politics, echoing the same logic the Athenians used: that ethical norms cannot override survival and national interest.

📉 Strategic Blowback: The Limits of Power

Importantly, Thucydides does not celebrate Athenian realism. The dialogue is meant to provoke discomfort. Athens’ overconfidence and moral decay, symbolized in its treatment of Melos, foreshadows its strategic overreach, including:

• The Sicilian Expedition (415–413 BCE), where Athens lost a large portion of its fleet and army.

• The eventual defeat by Sparta in 404 BCE.

Melos thus becomes a lesson in hubris—the danger of power unchecked by prudence or ethical restraint. Realists like Reinhold Niebuhr and Morgenthau would later warn that imperial overreach leads to decline, even in purely realist terms.

🧩 Contemporary Relevance

• The U.S. invasion of Iraq (2003) echoes elements of Melos: a powerful state bypasses moral and legal appeals to act unilaterally, justifying its actions through power and national interest. The strategic blowback in terms of regional instability mirrors Athens’ fate.

• Russia’s invasion of Ukraine (2014/2022) also shows realism’s darker edge: the logic of power politics over sovereignty, though modern international law challenges such realist actions.

🧠 Conclusion

The Melian Dialogue remains a cornerstone of classical realism, illustrating how states prioritize power, survival, and national interest above moral ideals in an anarchic world. Through Thucydides’ narrative, later theorists like Morgenthau drew inspiration to build a realist tradition that still shapes IR thinking today.

📚 Key References

• Thucydides. (431 BCE). The History of the Peloponnesian War.

• Morgenthau, H. J. (1948). Politics Among Nations: The Struggle for Power and Peace.

• Niebuhr, R. (1932). Moral Man and Immoral Society.

• Lebow, R. N. (2003). The Tragic Vision of Politics.

• Gilpin, R. (1986). “The Richness of the Tradition of Political Realism.” International Organization, 38(2).

Let me know if you’d like a visual summary or how this contrasts with Neorealism or Constructivism.

Here’s a short and clear explanation of each of your three points, suitable for a master’s-level understanding but concise and to the point:

1. Power Struggle and Criticism of Classical Realism

Classical Realism argues that the struggle for power is rooted in human nature. Thinkers like Hobbes and Morgenthau believed that humans are inherently self-interested and seek dominance, which translates into states acting competitively in an anarchic world.

🔍 Criticism:
Scholars like Kenneth Waltz (Neorealism) argue that Classical Realism overemphasizes human nature and ignores the structure of the international system (i.e., the lack of a global authority or “anarchy”) as the main cause of conflict. Waltz shifted focus from individuals to systemic pressures that shape state behavior regardless of leaders’ personalities.

2. Why Morgenthau Is Called the Father of Modern Classical Realism

Hans J. Morgenthau is called the father of modern classical realism because:

• He was the first to systematically codify realist principles in IR in his influential book Politics Among Nations (1948).

• He introduced the idea of “interest defined in terms of power”, making power the core of political analysis.

• His Six Principles of Political Realism laid the foundation for IR as a discipline grounded in empirical, power-based analysis rather than idealism.

He built a coherent framework that combined historical insight, political philosophy, and diplomatic experience—making realism both practical and theoretically grounded.

3. Ethical Ambiguity of Classical Realism

Classical realism often presents an ethically ambiguous view of politics:

• It acknowledges morality, but insists that states cannot afford to act morally when their survival is at stake.

• Morgenthau recognized the tension between moral principles and political necessity, but argued that prudent action (not moral idealism) must guide foreign policy.

🧭 Example: A realist might justify supporting a dictatorship if it aligns with national interest—even if it contradicts democratic or humanitarian values. This makes realism pragmatic, but also open to moral critique for appearing to excuse injustice.

Let me know if you’d like these points turned into a visual table or infographic.

Certainly! Here’s a short and clear summary of Hans J. Morgenthau’s Six Principles of Political Realism from Politics Among Nations (1948), widely regarded as the foundation of Classical Realism in international relations.

🧠 Morgenthau’s Six Principles of Political Realism (1948)

1. Politics is governed by objective laws rooted in human nature

   • Human nature is self-interested and power-seeking. Politics follows predictable patterns.

2. Interest is defined in terms of power

   • States act based on their national interest, which is measured in terms of power—not ideals.

3. Power is an objective and universally valid category

   • Though the forms of power (military, economic, etc.) may vary, the pursuit of power is constant.

4. Morality and politics must be separated

   • States cannot be held to the same moral standards as individuals. Moral principles must be applied with caution in international politics.

5. No state’s moral aspirations are universal

   • One nation’s claim to moral superiority cannot be imposed on others. Moral justifications often disguise national interest.

6. Politics is an autonomous sphere

   • International politics should be analyzed independently from law, economics, or ethics, using its own logic and concepts—mainly power and interest.

Would you like these principles applied to a real-world example (e.g., the Cold War, Ukraine conflict, or India’s foreign policy)?

Certainly. Here’s a detailed, historically grounded explanation of the Congress of Vienna (1814–1815) through the lens of classical realism, including deeper context, motivations of actors, long-term effects, and theoretical relevance—especially to thinkers like Hans Morgenthau and E.H. Carr.

🏛️ The Congress of Vienna and the Realist Concept of the Balance of Power

📜 Historical Context: Post-Napoleonic Europe

• After nearly 25 years of revolutionary and Napoleonic wars, Europe was devastated. Napoleon Bonaparte had radically disrupted the continental balance, spread revolutionary ideals, and created a French hegemony that threatened the survival of traditional monarchies.

• His defeat in 1814–1815 created a rare moment of opportunity: the victors could redesign the European order.

The Congress of Vienna (1814–1815) was not merely a peace treaty, but a grand strategic settlement meant to secure long-term stability in Europe. It was deeply guided by the principles of classical realism: power politics, balance, restraint, and the primacy of national interest over ideology.

🧠 Classical Realism in Action

1. The Primacy of Power over Ideology

• The major powers—Austria, Britain, Prussia, Russia, and France (re-admitted later)—did not impose revolutionary punishments or attempt to enforce moral or ideological re-education.

• Klemens von Metternich (Austria) and Lord Castlereagh (Britain) believed that order and stability, not retribution or democracy, were essential for peace.

• This reflects Hans Morgenthau’s principle that interest is defined in terms of power, not moral ideals or revolutionary fervor.

2. The Balance of Power Principle

• The goal was to prevent any one state from dominating Europe again, as France had under Napoleon.

• The powers redrew borders and arranged territorial compensation to maintain equilibrium:

  • Austria gained control in Northern Italy and Central Europe.

  • Prussia expanded into parts of Western Germany.

  • Russia took control of Poland.

  • Britain retained overseas colonies and naval supremacy.

• Crucially, France was not dismantled. The Bourbon monarchy was restored, and France was included in the Concert of Europe, a strategic act of balance and restraint.

🧠 Realist Insight: According to Morgenthau, peace is sustained not by punishing the defeated, but by ensuring no state becomes powerful enough to threaten others.

🔄 Inclusion Over Humiliation: Contrast with Versailles (1919)

• In 1919, after World War I, the Treaty of Versailles imposed heavy reparations and territorial losses on Germany, leading to resentment and the rise of Nazism.

• Classical realists like E.H. Carr (The Twenty Years’ Crisis, 1939) criticized Versailles for being driven by liberal idealism, rather than strategic foresight.

• In contrast, the Congress of Vienna’s inclusion of defeated France prevented revanchism and allowed France to reintegrate into the European balance—a lesson in realist diplomacy.

🕊️ The Concert of Europe: A Realist Success

• The Concert of Europe, created as a follow-up to Vienna, was a loose alliance system and mechanism for diplomacy among great powers.

• It served as an early prototype for institutionalized balance of power, helping to:

  • Coordinate responses to revolutionary movements.

  • Prevent war between major powers (except isolated conflicts like the Crimean War).

  • Maintain relative peace for nearly a century (1815–1914).

This is one of the most successful applications of realist strategy in history, highlighting the stability that can emerge from prudence, restraint, and balance, rather than ideological or moral dominance.

📚 Realist Thinkers on the Congress of Vienna

🧩 Broader Theoretical Relevance

• Realism views international politics as an anarchic system in which states pursue power and security, not moral objectives.

• The Vienna system confirmed that durable peace comes not from shared values, but from mutual recognition of interests and strategic equilibrium.

• The Congress showed that diplomacy can harness realism not just for war, but for sustainable peace—a critical insight for policymakers today.

📌 Summary

The Congress of Vienna (1814–1815) is a textbook case of classical realism in diplomatic practice:

• It prioritized stability over vengeance, interest over ideology, and balance over domination.

• It created a peaceful European order that lasted nearly 100 years.

• It remains a reference point for realists who argue that diplomatic prudence and power equilibrium, not moralistic policies, are the key to international peace.

Let me know if you’d like a visual map of the Vienna agreements or a comparison table with the Treaty of Versailles or other peace settlements.

Certainly! Here’s a short and clear explanation of both:

1. Existence of Germany Before and After the Napoleonic Wars

• Before Napoleon (pre-1806):

  • What is now Germany was not a single country.

  • It was a patchwork of over 300 small states and principalities, loosely united under the Holy Roman Empire.

  • The empire was weak and decentralized, with limited central authority.

• During Napoleon (1806–1815):

  • Napoleon dissolved the Holy Roman Empire in 1806.

  • He created the Confederation of the Rhine (a French satellite of 16 German states).

  • Napoleon’s wars weakened feudal structures and stirred early ideas of German nationalism.

• After Napoleon (post-1815):

  • At the Congress of Vienna, the Holy Roman Empire was not restored.

  • Instead, the German Confederation was created: a loose association of 39 German states under Austrian leadership.

  • It was not a nation-state, but a step toward German unification, which would only happen later in 1871 under Prussia.

2. Concert of Europe (1815–1850s)

• A diplomatic system created after the Congress of Vienna to maintain peace and balance of power in Europe.

• Key members: Austria, Britain, Russia, Prussia, and later France.

• Goal: Prevent the rise of another Napoleon-like hegemon and suppress revolutionary movements.

Main Features:

• Balance of Power: No single state should dominate Europe.

• Collective Security: Powers would consult each other on major issues.

• Intervention: To stop revolutions (e.g., in Italy, Spain).

Result:

• It prevented major wars among great powers for decades.

• Eventually weakened due to rising nationalism, revolutions (1848), and conflicting interests.

Let me know if you’d like a timeline or a map showing the German states before and after Napoleon!

Sure! Here’s a short and clear explanation for both:

1. German Unification in 1871 under Prussia

• Before 1871, “Germany” was a collection of independent states (e.g. Bavaria, Saxony, Prussia).

• Otto von Bismarck, the Prime Minister of Prussia, led the unification process using a policy of “blood and iron”—war and diplomacy.

• He engineered three wars:

  • Danish War (1864) – allied with Austria to gain territory.

  • Austro-Prussian War (1866) – defeated Austria to exclude it from German affairs.

  • Franco-Prussian War (1870–71) – defeated France, which united the German states under Prussian leadership.

• In 1871, after victory over France, the German Empire was proclaimed in the Hall of Mirrors at Versailles.

• Wilhelm I, King of Prussia, was crowned the first German Emperor (Kaiser).

2. Why Wilhelm I Was Kaiser, Not Bismarck – Who Had More Power?

• Wilhelm I was the hereditary monarch—king of Prussia and later emperor of unified Germany. He held the formal title and legitimacy.

• Otto von Bismarck was Chancellor—not a monarch, but the chief architect and actual decision-maker of unification.

🧠 Power comparison:

• Wilhelm I had the title and authority as emperor.

• But Bismarck had more real political power—he controlled foreign policy, military strategy, and domestic politics.

• Bismarck was often called the “Iron Chancellor” because he shaped German and European politics for decades—even managing the emperor’s decisions.

✅ In short:

• Wilhelm I was emperor by birth,

• Bismarck was the power behind the throne by skill and strategy.

Let me know if you’d like a visual chart of the unification wars or a Bismarck-Wilhelm power comparison!

Certainly! Here’s a detailed historical explanation of the Cuban Missile Crisis (1962) through the lens of classical realism, with key historical context, decision-making analysis, and connections to core realist concepts—especially those advanced by Hans Morgenthau and later nuclear realists like Kenneth Waltz and Robert Jervis.

☢️ The Cuban Missile Crisis and Classical Realism

📜 Historical Background

• In October 1962, U.S. intelligence discovered Soviet nuclear missiles being installed in Cuba, just 90 miles from Florida.

• This action was taken under the leadership of Nikita Khrushchev, General Secretary of the Soviet Union.

• The move was a response to:

  1. U.S. nuclear missiles stationed in Turkey and Italy, directly threatening the Soviet Union.

  2. The failed Bay of Pigs invasion (1961), which had revealed U.S. hostility toward the Cuban regime.

  3. Khrushchev’s desire to protect Cuba and project Soviet power in the Western Hemisphere.

🧠 Classical Realist Interpretations

1. Power and National Interest Over Ideology

Classical realism posits that states act not out of ideology or morality, but to protect core national interests—security, power, and survival.

• President John F. Kennedy and his advisors, including Defense Secretary Robert McNamara and diplomat Dean Acheson, approached the situation as a threat to U.S. strategic balance and deterrence credibility.

• Khrushchev’s decision was similarly strategic—not ideological. He aimed to correct a strategic asymmetry caused by U.S. Jupiter missiles in Turkey, not spread communism to the Americas.

2. Prudence in Statecraft (Morgenthau’s Principle)

Hans Morgenthau emphasized prudence as the supreme virtue of political leaders—carefully calculating risks rather than acting on passion or ideology.

• Kennedy rejected extreme options: an immediate military strike or passively accepting the missile deployment.

• Instead, he chose a naval quarantine (a form of limited blockade), allowing time for diplomacy without provoking open war.

• This was a calibrated use of power—assertive, but measured—designed to pressure the USSR while leaving room for de-escalation.

🧠 Realist Lesson: Prudence means using power rationally, not recklessly.

3. Diplomatic Bargaining and Strategic Accommodation

Realists argue that even in intense rivalry, states can negotiate when doing so serves their interest.

• After thirteen tense days, the crisis ended through backchannel diplomacy:

  • Publicly: Khrushchev agreed to withdraw Soviet missiles from Cuba.

  • Privately: The U.S. pledged not to invade Cuba and later withdrew missiles from Turkey (though this was not made public at the time).

This resolution was not based on shared ideology, but on reciprocal strategic concessions—core realist diplomacy.

⚖️ Nuclear Deterrence and “Nuclear Realism”

The crisis marked a turning point in nuclear strategy and the evolution of realist thinking into what is sometimes called “nuclear realism”.

Key ideas:

• Mutually Assured Destruction (MAD): both sides had second-strike capabilities, meaning that nuclear war would result in total destruction for all.

• Realists like Kenneth Waltz and Robert Jervis argued that this made direct war between nuclear powers irrational—power was now constrained by the threat of annihilation.

💡 Realist Implication: Nuclear weapons don’t make states safer by allowing dominance—they force states to act with restraint and calculation.

🔍 Why It Matters: Legacy and Realist Insights

🧩 Summary

The Cuban Missile Crisis was a defining moment in the Cold War and a vivid demonstration of classical realist principles adapted to the nuclear age:

• States prioritized security and survival above ideology.

• Leaders exercised prudence and understood the limits of military power.

• Mutual deterrence replaced unilateral domination as the logic of international stability.

• Realist diplomacy allowed for strategic compromise, even in a bipolar ideological standoff.

As Morgenthau warned, states must act with moral responsibility grounded in political reality—and in 1962, both Kennedy and Khrushchev did just enough to step back from the brink.

Let me know if you’d like this visualized as a decision-tree or compared with other Cold War flashpoints (like Berlin or Vietnam).

Here’s a clear and concise explanation of each point with historical context:

1. U.S. Nuclear Missiles in Turkey and Italy – When and Why?

• 1959–1961: The United States deployed Jupiter intermediate-range ballistic missiles (IRBMs) in Turkey and Italy.

• These were capable of striking deep into the Soviet Union within minutes.

• Their placement was part of NATO’s Cold War strategy to deter Soviet aggression.

• To Moscow, this was a direct and provocative threat—a major reason why Khrushchev placed Soviet missiles in Cuba in 1962.

2. Bay of Pigs Invasion (1961)

• In April 1961, the U.S. CIA backed an invasion of Cuba using Cuban exiles to overthrow Fidel Castro’s communist regime.

• The invasion failed disastrously:

  • Poor planning and no U.S. air support.

  • Castro’s forces quickly defeated the invaders.

• This humiliated the Kennedy administration and pushed Castro closer to the Soviet Union for protection.

• It signaled to the USSR that the U.S. might try again, which helped justify placing Soviet missiles in Cuba.

3. Khrushchev’s Goals: Protecting Cuba and Projecting Soviet Power

• Protect Cuba: After the failed Bay of Pigs invasion, Castro feared another U.S. attack. Khrushchev offered missiles as protection.

• Project power in the Western Hemisphere: The USSR had no allies or bases in the Americas. Placing missiles in Cuba:

  • Challenged U.S. dominance in the Western Hemisphere (Monroe Doctrine).

  • Balanced against U.S. bases near the Soviet Union.

• Communist developments in the region at the time:

  • Cuba (1959) was the first country in the Western Hemisphere to become communist-aligned under Castro.

  • Other countries (e.g., Nicaragua, Guatemala) had leftist movements, but Cuba was the only communist government at the time.

4. Kennedy’s Choice of Naval Quarantine – Explained Clearly

• After discovering the missiles, Kennedy’s advisors debated:

  • Full air strike/invasion – risky; could provoke nuclear war.

  • Do nothing – would make the U.S. look weak and unsafe.

• Kennedy chose a “naval quarantine” (not called a “blockade” to avoid declaring war):

  • U.S. Navy surrounded Cuba to stop further Soviet shipments of missiles.

  • It bought time for backchannel diplomacy with Khrushchev.

  • The approach was firm but measured—applying pressure without triggering war.

5. Major Events of the Cuban Missile Crisis – Key Points

Let me know if you’d like a visual timeline or a decision matrix of Kennedy’s crisis options.

Short Explanation:

The Russian (Soviet) missiles in Cuba in 1962 challenged U.S. dominance in the Western Hemisphere by violating the Monroe Doctrine—a long-standing U.S. foreign policy principle.

What is the Monroe Doctrine?

• Introduced in 1823 by President James Monroe.

• Declared that the Western Hemisphere was under U.S. protection.

• Warned European powers not to interfere in the affairs of the Americas.

How the Soviet Missiles in Cuba Challenged It:

• By placing nuclear missiles in Cuba, the USSR established a direct military presence just 90 miles from U.S. shores.

• This was the first time a major rival power projected strategic force in the Americas.

• It defied the U.S.’s claimed sphere of influence and undermined its regional hegemony.

• The move shocked American leadership, as it symbolized a loss of control in what they considered their geopolitical “backyard.”

In short:
The Soviet missiles in Cuba directly challenged the U.S.’s 140-year-old policy of keeping foreign powers out of the Western Hemisphere, threatening both its security and global credibility.