Ben Clarke

Proportionality in Armed Conflicts: A Principle in Need of Clarification

In their quest to find ways to reduce civilian casualties during armed conflict, States often emphasise the importance of compliance with fundamental rules of international humanitarian law that apply during the conduct of hostilities. Chief among them are the rules of distinction, proportionality and precaution. This contribution focuses on the proportionality principle. It examines whether there is a need for clarification or development of this rule. After highlighting reasons why clarification of the law on proportionality is necessary, the author proposes a guidance document on proportionality decision-making in armed conflict. To lay the foundation for such a document, the author identifies a range of issues that could be addressed in the document.

Contemporary Research on Proportionality in Armed Conflicts: A Select Review

In an attempt to impose limits on the level of acceptable incidental civilian suffering during armed conflict, international humanitarian law (IHL) articulates a proportionality formula as the test to determine whether or not an attack is lawful. Efforts to comply with that formula during the conduct of hostilities can involve a host of legal and operational challenges. These challenges have inspired a growing body of doctrinal and empirical research. A recent international conference in Jerusalem, co-sponsored by the Delegation of the International Committee of the Red Cross in Israel and the Occupied Territories and the Minerva Center for Human Rights at the Hebrew University of Jerusalem, brought together human rights lawyers, military experts and scholars from a variety of disciplines to assess recent developments relating to the proportionality principle in international humanitarian law. This report examines ten conference presentations which offer important insights into: the nature, scope of application and operational requirements of the proportionality principle under IHL; the modalities of investigation and review of proportionality decisions; and the challenges involved in proportionality decision-making.