“The Rights and Obligations of Parties to International Armed Conflicts”

This chapter argues that the process commonly described as the development of international law “from bilateralism to community interest” should be dis-aggregated into its formal, procedural, and substantive dimensions. A move away from formal and procedural bilateralism is always a move towards community interest because it furthers the rule of law. In contrast, a move away from formal/procedural bilateralism does not guarantee a better protection of the community’s substantive interests. International humanitarian law is a trailblazer of procedural and formal progress, yet a slacker in the substantive move toward what is commonly taken to be community interest: protecting the individual. The chapter further shows that alongside protecting the individual, the international community has a second competing substantive interest in the regulation of warfare: preserving military efficacy. International humanitarian law’s development highlights that progress in international law is more complex than the phrase “from bilateralism to community interest” suggests .