Methodology
This page outlines methods for studying international law, international relations, and the interdisciplinary field that connects them. It is designed as a research guide for reading the archive: legal materials should be analyzed as law, as institutional practice, and as evidence of political behavior.
International law
International legal method starts from legal materials: treaties, custom, general principles, judicial decisions, institutional practice, state practice, and scholarly argument. It asks what the law is, how legal authority is produced, and how legal claims are justified.
International relations
International relations method studies how states, international organizations, firms, courts, and transnational actors behave under conditions of power, interdependence, uncertainty, and institutional constraint. It asks why actors comply, contest, cooperate, or defect.
Interdisciplinary IL/IR
Interdisciplinary work on international law and international relations treats law neither as autonomous doctrine nor as mere rhetoric. It studies how legal forms influence power, how politics shapes legal institutions, and how norms become actionable through domestic and international processes.
International law
International legal method starts from legal materials: treaties, custom, general principles, judicial decisions, institutional practice, state practice, and scholarly argument. It asks what the law is, how legal authority is produced, and how legal claims are justified.
Reads legal texts, institutional decisions, and state practice to reconstruct rules, exceptions, and standards of argument. Treaty interpretation, sources doctrine, and the treatment of precedent sit at the center of this method.
Places legal rules and concepts in time. It studies drafting histories, institutional archives, diplomatic records, and the changing political settings in which international legal ideas were formed and used.
Compares how legal norms are developed, received, and enforced across courts, organizations, domestic legal systems, and regional orders. It is useful for studying how China, other states, and institutions translate international law into practice.
Examines how international law is shaped by power, empire, development, inequality, and political economy. These approaches ask whose interests are stabilized by legal categories and whose experiences are omitted.
International relations
International relations method studies how states, international organizations, firms, courts, and transnational actors behave under conditions of power, interdependence, uncertainty, and institutional constraint. It asks why actors comply, contest, cooperate, or defect.
Uses realist, liberal, institutionalist, constructivist, English School, and critical theories to specify expectations about behavior. Theory clarifies what counts as evidence and what mechanism is being tested.
Studies particular disputes, institutions, negotiations, or crises in depth. Process tracing follows sequences and mechanisms, making it especially useful for connecting legal argument to diplomatic choice and political outcome.
Compares a limited number of cases to identify patterns, scope conditions, and alternative explanations. It helps separate claims about China-specific practice from broader institutional or regional trends.
Uses datasets, coding, statistical models, network analysis, or text-as-data methods to study treaty participation, voting, compliance, litigation, sanctions, investment flows, or institutional behavior at scale.
Interdisciplinary IL/IR
Interdisciplinary work on international law and international relations treats law neither as autonomous doctrine nor as mere rhetoric. It studies how legal forms influence power, how politics shapes legal institutions, and how norms become actionable through domestic and international processes.
Studies degrees of obligation, precision, delegation, monitoring, and dispute settlement. This method helps compare hard law, soft law, political commitments, and institutional mechanisms such as WTO litigation or mediation bodies.
Asks whether legal commitments change conduct, through what mechanisms, and under what conditions. It combines legal interpretation with evidence about incentives, reputation, domestic politics, capacity, and mobilization.
Studies how actors use legal language to justify, contest, and reframe conduct. It is well suited to research on sovereignty, non-interference, human rights, sanctions, and the vocabulary of international order.
Combines doctrinal reading, institutional analysis, interviews, archival research, datasets, and close case studies. The aim is to explain both the formal legal claim and the political work that claim performs.
Academic literature
The selections below are starting points rather than an exhaustive bibliography. They are grouped by the research problem they help answer: how to reason legally, how to infer politically, and how to connect law and politics in one research design.
Works on sources, interpretation, legal reasoning, history, critical method, and the internal structure of international legal argument.
Broad handbook on doctrinal, empirical, critical, comparative, historical, and interdisciplinary methods in international law.
A central collection mapping major approaches to international legal method after the late twentieth-century methodological debates.
Comprehensive reference on theoretical traditions, concepts, and debates that shape how international law is analyzed.
Detailed guide to treaty interpretation under the Vienna Convention rules and related international practice.
Classic critical account of international law as an argumentative practice between concreteness and normativity.
Foundational TWAIL work on colonial encounter, sovereignty, and the historical construction of international law.
Important recent work on the relation between legal reasoning, historical method, and political contestation.
Key article surveying empirical international legal scholarship and the methodological choices behind it.
Works on research design, causal inference, case studies, process tracing, constructivism, norm dynamics, and empirical analysis of international behavior.
Influential statement of a unified logic of inference for qualitative and quantitative political science.
Core book for case-study design, typological theory, and disciplined comparison in political science and IR.
Standard reference for process tracing, causal mechanisms, and within-case evidence.
Constructivist article showing how ideas, identity, and interaction can be treated as causal and constitutive factors in IR.
Canonical article on norm emergence, cascade, internalization, and the study of ideational change.
Important critique of selection effects and the interpretation of high compliance rates in international regimes.
Review article on why states comply with international agreements and how compliance should be studied.
Works that explicitly join legal analysis with IR theory, institutional design, compliance research, domestic politics, and empirical study.
Major edited volume taking stock of IL/IR scholarship on lawmaking, interpretation, compliance, courts, and institutions.
Reader collecting influential International Organization articles on legal commitments, institutions, compliance, and cooperation.
Book version of the International Organization legalization project, useful for studying law as institutionalized politics.
Rational-choice account of international law's influence through reputation, reciprocity, and retaliation.
Empirical and institutional study of international courts and their effects on law and politics.
Analyzes law as a practice used by states and other actors to authorize, contest, and structure power.
Early and influential invitation for international lawyers to use modern IR theory.
Classic article defining a new generation of IL/IR scholarship.
Defines legalization through obligation, precision, and delegation, a core bridge concept for IL/IR work.
Important empirical legal study of treaty ratification and human-rights outcomes.
Combines quantitative analysis and case studies to explain how international law operates through domestic politics.