Before We Start
The single premise that generates the entire theory
Realism begins from a stark observation: there is no world government with the authority to enforce order among states — the international system is genuinely anarchic. From this single premise, realists derive a consistent set of predictions about how states actually behave.
💡 Anarchy Doesn't Mean Chaos — It Means "No Higher Authority"
In this context, "anarchic" doesn't mean disorder or chaos in the everyday sense — it specifically means there's no world government or higher authority that can enforce rules on sovereign states, the way a domestic government can enforce laws on its own citizens.
Mnemonic
The realist logical chain
No World Government
The starting condition
Unlike domestic politics, where a government can enforce laws and settle disputes, no equivalent authority exists at the international level.
States Must Fend for Themselves
Self-help follows from anarchy
Without a higher authority to rely on for protection, each state must ultimately ensure its own security — this is what realists mean by "self-help."
Alliances Are Temporary Convenience
Not genuine, lasting friendship
Because states are ultimately self-interested, realist theory predicts that alliances form and dissolve based on shifting interests, rather than reflecting durable, values-based partnerships.
War Is Always Possible
Not necessarily constant, but never off the table
Because no higher authority can guarantee peace, the possibility of war is a permanent, structural feature of the international system under realist theory — not a temporary or eliminable problem.
💊 Realism's explanatory power is worth stating directly: this framework explains recurring patterns like arms races and balance-of-power politics (covered in its own dedicated lesson) as rational, predictable responses to anarchy — not as irrational or avoidable behavior, but as the logical consequence of the system's basic structure.
⚖️ Applying the Framework — Predicting State Behavior Through a Realist Lens
Two states that have been close allies for decades begin to drift apart diplomatically after one state's relative power and strategic interests shift significantly.
Apply the Realist Prediction
A realist would predict exactly this kind of shift — alliances are viewed as temporary arrangements of convenience rather than fixed, values-based commitments, so a genuine change in one state's interests or relative power would be expected to strain or dissolve the alliance. This isn't a failure or breakdown of the relationship in realist terms — it's the system working exactly as the theory predicts.
Connect to the Underlying Anarchy Premise
Because there's no higher authority holding these two states to their prior alliance commitment, each state remains free to reassess and adjust its alignment based on its own current self-interest — precisely the self-help logic that flows from the system's anarchic structure. This scenario illustrates the full realist chain, from the anarchy premise through to the specific alliance-shifting prediction.
📌 Exam Application
Realism questions test both the theory's core premise and its specific predictions:
Core premise: "What is the foundational assumption of realist IR theory?" → The international system is anarchic — there is no world government with authority over sovereign states.
Prediction: "How does realism characterize international alliances?" → As temporary arrangements of convenience based on shifting self-interest, not durable, values-based partnerships.
Explanatory application: "What real-world phenomena does realism claim to explain particularly well?" → Arms races and balance-of-power politics.
⚠️ The Trap — Confusing "Anarchic" (No World Government) With Chaotic or Disordered
The everyday meaning of "anarchy" suggests chaos or lawlessness, which can lead to misinterpreting the realist claim as saying the international system is inherently chaotic or unpredictable. In IR theory, "anarchic" specifically and narrowly means the absence of a higher governing authority — the system can still be highly patterned and predictable within that anarchic structure.
The safeguard: Use "anarchic" in its precise IR-theory sense — absence of a world government — rather than its everyday connotation of chaos or disorder.
✓ Quick Self-Test
Answer before checking:
1. What is the foundational premise of realist IR theory?
2. What does "anarchic" specifically mean in this context?
3. How does realism characterize alliances?
4. What real-world phenomena does realism claim to explain?
Answers:
1. The international system is anarchic — no world government has authority over sovereign states.
2. The absence of a higher governing authority, not chaos or disorder in the everyday sense.
3. Temporary arrangements of convenience based on shifting self-interest, not durable partnerships.
4. Arms races and balance-of-power politics.