Unity, Diversity and the Fragmentation of International Law: How Much Does the Multiplication of International Organizations Really Matter?

It seems to be presumed by many that the simple multiplicationof international organizations (IOs) weakens the unity and integrityof international law. There is, in reality, nothing obviousin this assumption. First, there needs to be evidence of duplicationor overlaps in the various competences of IOs. Second, it needsto be proven that, in the instances in which the activitiesof IOs do overlap, such overlap translates into competition,divergence or conflict. Last, and most importantly, rival orcompeting activities must be of normative significance. Thisessay proposes to address the preliminary question which, infact, precedes and underpins all the others as regards the multiplicationof IOs and international legal unity: how do IOs matter in themaking of international law? IOs, we argue, are more shapersthan makers of international law and their multiplication istherefore not a source of increased chaos in the internationalnormative puzzle.