Waltz’s Neorealism

• N E O R E A L I S M, S T R U C T U R A L T H E O R I E S

Balance of Power as a Reaction to a Threat: Balance of Power as a Reaction to a Threat: Napoleon, 1802-1815Napoleon, 1802-1815

Major Powers: FRA, UK, RUS, PRUS, AUS

Russia

After French Revolution (1789), Napoleon Bonaparte rises to power. -- Consul (1802) -- Emperor of France (1804)

Continues military campaigns to build empire and feed war machine. -- Poses major threat to Europe

UK, RUS, PRUS, AUS form “coalitions” against FRA -- Napoleon defeated (1814) -- Congress of Vienna (1814) -- Napoleon returns (1815) -- Waterloo (1815)

• N E O R E A L I S M, S T R U C T U R A L T H E O R I E S

BoP as a Peaceful Equilibrium: Concert of Europe, 1815-1848BoP as a Peaceful Equilibrium: Concert of Europe, 1815-1848

After Napoleonic Wars, Congress of Vienna continues (1815)

Defeated France let back into “club”

Quadruple Alliance: Austria, Britain, Prussia, Russia

Congresses held to attempt to resolve issues.

Buffer states/territory traded.

Russia

• N E O R E A L I S M, S T R U C T U R A L T H E O R I E S

Bipolarity vs Bipolarity vs MultipolarityMultipolarity

1792 1815 1854 1866 1870Napoleonic Wars

Concert of EuropeCrimean War

Austro-Prussian WarFranco-Prussian War WW I WW II

1914 1939

Multipolarloose, shifting alliances, Britain as balancer

four or five Great Powers

1945 1990Cold War—or “Long Peace”

Bipolar(two Great Powers, tight blocs)

?

(“peaceful”)

• N E O R E A L I S M, S T R U C T U R A L T H E O R I E S

Bipolarity vs MultipolarityBipolarity vs Multipolarity• Internal balancing is more reliable• External balancing can give rise to

miscalculations that lead to general war– Large influence of small allies– Deterrence fails because there is an

incentive to defect from commitments– As numbers grow, strategic complexity

grows geometrically

• Uncertainty is the leading cause of war

Structural Theories: WWIStructural Theories: WWI

Allied PowersAllied Powers

• France

• Great Britain

• Russia

Central PowersCentral Powers

• Austria-Hungary

• Germany

Multipolar SystemMultipolar System

• Abandoning an ally invites one’s own destruction

• In a moment of crisis, the weaker or more adventurous party (Austria) is likely to determine its side’s policy

• Its partners (Germany) can afford neither to let the weaker member be defeated nor to advertise their disunity by failing to back a venture even while deploring its risks

Structural Theories: WWIStructural Theories: WWI

Allied PowersAllied Powers

• France

• Great Britain

• Russia

Central PowersCentral Powers

• Austria-Hungary

• Germany

Balance of PowerBalance of Power

• The Triple Entente and the Triple Alliance were approximately balanced

• The defeat of any great power would give the opposing coalition a decisive advantage in the overall European balance of power

• Britain entered the war to prevent Germany from upsetting the balance of power on the continent

Structural Theories: WWIStructural Theories: WWI

Allied PowersAllied Powers

• France

• Great Britain

• Russia

Central PowersCentral Powers

• Austria-Hungary

• Germany

Alliance SystemAlliance System

• The establishment of the Triple Entente and the Triple Alliance divided the European powers into two camps

• While seen as a form of self-protection, the alliances also had the potential to escalate small crises into major wars

• When Austria-Hungary declared war on Serbia, this brought Serbia’s ally Russia into the war, which brought Germany, France, and Britain into the war

Strengths of Structural Realism

• Parsimony• Focus on systemic effects• Power is defined as capabilities (non-

tautological)• Explanatory power is in the constraints,

not in the preferences• Collective action• Probabilistic predictions