Explain the uses of systems approach in international relations and examine the relevance of Kaplan’s system analysis. (2011, 30 Marks)
The systems approach entered international relations with the behavioural turn of the 1950s. Borrowing from Ludwig von Bertalanffy‘s general systems theory and David Easton‘s model of the political system, it treats international politics as a whole of interacting units whose recurrent behaviour is explained by the structure of that whole rather than by the biography of each state. Morton A. Kaplan‘s System and Process in International Politics (1957) is its most ambitious product, and its most criticised.
Uses of the systems approach
- A systemic level of analysis. J. David Singer (1961) separated explanation at the level of the system from explanation at the level of the state, so that patterns such as alliance formation could be traced to configurations.
- Comparison across history. Richard Rosecrance (Action and Reaction in World Politics, 1963) compared successive European systems to ask what made some stable and others not.
- A working vocabulary. Boundary, environment, equilibrium, feedback and transformation let scholars ask how an order persists under stress and when it becomes a different order.
- The polarity debate. Kenneth N. Waltz (“The Stability of a Bipolar World”, 1964) held bipolarity the more stable structure; Karl W. Deutsch and Singer (1964) defended multipolarity. Waltz’s Theory of International Politics (1979) made systemic theory the reference point of neorealism.
- Explicit assumptions. Claims about “the balance of power” now had to state how many actors it needs and what behaviour it requires.
Kaplan’s system analysis
Kaplan specified each model by essential rules, transformation rules, and actor, capability and information variables, and set out six models:
- Balance of power: at least five essential actors who expand by negotiation where possible, stop short of eliminating a great power, oppose any would-be hegemon and readmit defeated enemies as partners.
- Loose bipolar: two blocs plus non-members and a universal actor, the closest fit to the Cold War, with non-aligned states such as Jawaharlal Nehru’s India mediating.
- Tight bipolar, universal, hierarchical and unit veto (every actor able to destroy every other) are logical constructions that never existed. In 1969 he added four variants, among them détente and incomplete nuclear diffusion.
How relevant is Kaplan today?
Enduring contributions
- The balance-of-power rules explain why the Congress of Vienna’s lenient peace lasted while Versailles did not.
- The non-member role anticipates the space India claims through strategic autonomy amid US–China rivalry, and the unit veto model isolates the logic of nuclear deterrence.
Limitations
- Taxonomy, not theory. Stanley Hoffmann (1959) judged the models formally rigorous but empty of politics; the rules are read off eighteenth-century Europe rather than derived.
- Failed prediction. Kaplan expected loose bipolarity to tighten; instead the non-aligned group grew to some 120 members.
- Systems in name only. Easton’s inputs, conversion, outputs and feedback are missing, and the system has no environment.
- Blind spots. Domestic politics, ideology and non-state actors have no place, and Amitav Acharya and Barry Buzan (2007) show how such theory universalises European history.
- Poor fit. Today’s world blends US military pre-eminence, Chinese competition, several economic poles and nine nuclear-armed states. The BRICS New Delhi Declaration of September 2026 seeking IMF, World Bank and WTO reform, and the US announcement in January 2026 of withdrawal from 66 international bodies, show a universal actor weakening and coalitions shifting in ways no single model captures.
- Method. Hedley Bull (1966) warned that strict scientific standards leave little of significance to say.
Conclusion
Kaplan’s relevance is heuristic, not predictive. His models disciplined thinking about structure and remain useful lenses for bipolarity, multipolarity and deterrence, but the systems approach survives through Waltz’s leaner structural theory and its critics rather than through Kaplan’s taxonomy.