For the complete documentation index, see llms.txt.Skip to main content
The levels of analysis framework is a core analytical tool in IR theory used to organize explanations of international events by locating their causes at different scales. The framework was popularized by Kenneth Waltz in Man, the State, and War (1959), which distinguished three "images": human nature, the internal character of states, and the anarchic structure of the international system. J. David Singer's 1961 article "The Level-of-Analysis Problem in International Relations" formalized the methodological stakes, warning that mixing levels can produce incoherent or contradictory explanations.
Most contemporary textbooks use a three- or four-level scheme:
Different theoretical traditions emphasize different levels. Neorealism is systemic; liberalism and democratic peace theory draw heavily on the domestic level; constructivism operates across levels by foregrounding identity and norms; foreign policy analysis often concentrates on individuals and small groups. The framework does not itself answer causal questions—it disciplines the researcher to specify where a proposed cause sits and to avoid conflating unit-level attributes with system-level outcomes (Waltz's "reductionist" critique).
For MUN delegates and junior researchers, the framework is useful for structuring position papers and policy memos: identify whether a problem is driven primarily by leader-level choices, domestic politics, systemic pressures, or transnational dynamics, and tailor recommendations to that level.
Kenneth Waltz introduced the three 'images' in Man, the State, and War (1959), and J. David Singer formalized the methodological problem in a 1961 World Politics article.
Most scholars use three (individual, state, system), but many add a fourth global or transnational level to capture institutions, norms, and non-state actors.
Singer warned that combining unit-level and system-level claims can yield inconsistent or untestable explanations, because each level implies different causal logics and units of observation.