Realism & Neo-Realism (Comparison)


1. Similarities Between Realism and Neo-Realism

Both theories belong to the Realist tradition, so they share many basic assumptions.

1. International system is anarchic

There is no world government, so states must take care of their own security.

2. States are the main actors

Both see states (not NGOs, MNCs, or individuals) as the most important players in world politics.

3. National interest guides behavior

States act to protect their own interests, mainly security and survival.

4. Power is important

Both say power (especially military power) is crucial for survival.

5. World politics is competitive

Conflict, rivalry, and struggle for power are natural.

6. International relations are driven by fear and uncertainty

States are never fully sure about other countries’ intentions.

7. Cooperation is difficult

Both argue that deep, lasting cooperation is rare because states always worry about being cheated or becoming weaker.


2. Differences Between Realism and Neo-Realism

Neorealism is a more scientific, modern version of realism, so the differences are very important.


A. Basis of the Theory

Realism

  • Based on human nature
  • Says humans are selfish → so states are selfish
  • Thinkers: Thucydides, Machiavelli, Hobbes, Morgenthau

Neorealism

  • Based on structure of the international system
  • Anarchy, not human nature, causes conflict
  • Thinker: Kenneth Waltz

B. What Drives State Behavior?

Realism:

👉 Human nature → desire for power
State behavior depends on leaders, ambition, emotions.

Neorealism:

👉 International structure → anarchy and distribution of power
State behavior is shaped by the system, not by personal motives.


C. Purpose of Power

Realism:

  • States seek power for power’s sake
  • Power = main goal
  • Classical realists think power brings prestige and dominance

Neorealism:

  • States seek security, not power
  • Power is only a tool for survival
  • Too much power can create enemies (Defensive Realism)

D. Focus Level (Unit of Analysis)

Realism:

  • Focuses on individuals and states
  • Leadership and decision-makers matter

Neorealism:

  • Focuses on the entire system
  • Structure and polarity matter more than leaders

E. Methodology

Realism:

  • More philosophical and descriptive
  • Based on historical case studies

Neorealism:

  • More scientific and mathematical
  • Uses models, structural analysis, and patterns

F. Types of Realism

Realism

  • Mostly one dominant form—Classical Realism

Neorealism

Has two types:

  1. Defensive Realism (Waltz) – states seek enough power for security
  2. Offensive Realism (Mearsheimer) – states seek maximum power, maybe hegemony

G. Explanation of War

Realism:

War happens because humans desire power and domination.

Neorealism:

War happens because the international system forces states to fear each other.


3. Table Summary (Easy to Remember)

PointRealismNeorealism
FoundationHuman natureInternational structure
ThinkerMorgenthauKenneth Waltz
Main GoalPowerSecurity
FocusStates & leadersSystem & polarity
MethodPhilosophicalScientific
Cause of WarHuman selfishnessAnarchy of system
View of powerCentral goalInstrument for survival
TypesClassical RealismDefensive & Offensive Realism

4. Very Short Exam Summary

Realism explains world politics through human nature and says states seek power due to selfishness.
Neorealism explains world politics through the structure of the international system and says states seek security in an anarchic world.
Both agree that the world is competitive, states are key actors, and power politics dominates international relations.

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