The State-centric bias in proportionality in international humanitarian law, where non-State armed groups (NSAGs) are expected to adhere to the same rigour of proportionality as States, regardless of how unrealistic that expectation is, has not often been considered in ideas to improve compliance with proportionality. This article puts forth three proposals – a Comprehensive Proportionality Assessment Framework, capacity-building for military actors, and rapid multidisciplinary assessment teams – that aim to reduce State-centric bias and strengthen proportionality compliance not just for States but for all parties to conflict, including NSAGs.
