pt.1. The structures of international law -- The centipede and the centrifuge: principles for the centralisation and decentralisation of governance -- On the causes of uncertainty and volatility in international law -- Structural paradigms of international law -- Subsidiarity as a method of policy centralisation -- Fragmentation(s) of international law: on normative integration as authority allocation. pt.2. International authority and the state -- State sovereignty, international legality and moral disagreement -- Democracy without sovereignty: the global vocation of political ethics -- Subsidiarity, fragmentation and democracy: towards the demise of general international law? pt.3. Allocation of authority among judicial bodies -- Towards a Solange-method between international courts and tribunals? -- Exercise in constitutional tolerance? When public international law meets private international law: Bosphorus revisited -- Domestic courts and sovereignty. pt.4. Allocations of authority in specific normative contexts -- Regionalism, economic interdependence, approximation of laws and their impact on sovereignty, national identity, and legitimacy: the Euro-Med case -- Conflicting obligations in international investment law: investment tribunals' perspective -- Multi-level accountability: a case study of accountability in the aftermath of the Srebenica massacre -- Territorial administration by non-territorial sovereigns.