In international law, the term ‘fragmentation’ often evokes the imagery of a fractured system in need of repair. This metaphor highlights a core issue: the division of what was once a cohesive whole into separate parts. The task then becomes finding a solution to restore unity. Consider the analogy of a city where each public authority operates in isolation, adhering strictly to its own rulebook. The traffic department, focused solely on roads, ignores environmental concerns. Environmental regulators disregard property rights, concentrating only on trees. Meanwhile, tax authorities overlook constitutional guarantees, leaving these matters to others. Each entity excels in its domain, yet the city as a whole descends into chaos.
International law occasionally mirrors this scenario. Investment lawyers converse in investment law, trade lawyers in trade law, human rights lawyers in human rights law, and climate lawyers in climate law. These regimes, each with its own institutions, vocabulary, and priorities, risk becoming a collection of adjacent apartments, where occupants spend more time arguing over common spaces than maintaining the structure.
Systemic Integration: A Solution to Fragmentation
Article 31(3)(c) of the Vienna Convention on the Law of Treaties addresses this issue by mandating that treaties be interpreted in light of “relevant rules of international law applicable in the relations between the parties.” This is known as the principle of systemic integration, a key response to fragmentation identified by the International Law Commission. Scholars often describe it as a treaty interpretation doctrine that helps maintain coherence among increasingly specialized legal regimes. However, this raises a deeper question: Why is coherence within international law desirable?
Philosophical Foundations: Holism in International Law
Systemic integration is more than a rule of treaty interpretation; it reflects a philosophical commitment to holism. Holism posits that meaning cannot be fully understood by examining isolated parts alone. The meaning of a legal rule is derived from the broader legal system it inhabits. Yet, legal arguments frequently contradict this, treating treaty provisions as isolated artifacts.
Wittgenstein and the Concept of Family Resemblance
Ludwig Wittgenstein’s notion of “family resemblance” suggests that concepts do not require a single defining characteristic. Rather, family members may share various traits, such as eye color or mannerisms, without a single commonality. International law operates similarly. Despite being negotiated by different actors for diverse purposes, regimes like investment law, environmental law, trade law, and human rights law often share familiar concepts: good faith, proportionality, due process, and sustainable development. Systemic integration acknowledges these family-like relationships.
Quine’s Web of Belief and Interconnected Legal Regimes
W.V.O. Quine’s “web of belief” theory further illustrates why legal regimes cannot remain isolated. Knowledge is not a collection of independent propositions but a network of interconnected beliefs. In international law, trade measures affect environmental regulation, which in turn affects investment protection, and so forth. Legal norms exist within a broader network of meaning, and systemic integration recognizes this interconnectedness.
Gadamer, Dworkin, and the Pursuit of Coherence
Hans-Georg Gadamer’s hermeneutic circle suggests that understanding the whole requires understanding its parts and vice versa. Article 31(3)(c) institutionalizes this process, inviting interpreters to move between text and system. Ronald Dworkin’s theory of law as integrity argues for coherence in legal systems, asserting that law derives legitimacy from cohesive principles. Systemic integration reflects this pursuit of legal integrity.
Climate Change and the Need for Systemic Integration
Climate-related investment disputes highlight the necessity of systemic integration. Investment treaties, often predating modern climate governance, intersect with newer climate obligations. Cases like Rockhopper v. Italy and RWE v. Netherlands demonstrate the futility of treating investment law and climate governance as separate. Systemic integration allows for principled adjudication by considering both investment protection and climate mitigation within a broader normative framework.
Conclusion: Embracing Holism in International Law
While specialized regimes exist for valid reasons, systemic integration promotes coherence without mandating uniformity. It ensures that differences remain intelligible within a common legal framework. Systemic integration is more than a conflict-management tool; it affirms that international law functions as a cohesive system. Wittgenstein, Quine, Gadamer, and Dworkin collectively illustrate why coherence remains a worthy aspiration. Article 31(3)(c) is thus a legal expression of philosophical holism, reminding us that despite differences, we all share the same legal edifice.
Mikhail Behl is a Counsel, Arbitrator & Mediator operating out of the Chambers of Mikhail Behl.
