Stuart Casey-Maslen is an international lawyer specialising in the use of force and the protection of civilians. He is an honorary Professor at the Centre for Human Rights at the University of Pretoria. He has written widely on international human rights and humanitarian law, arms control and disarmament law, and jus ad bellum. The late Christof Heyns was a member of the UN Human Rights Committee (2017–2020), the former UN Special Rapporteur on extrajudicial, summary or arbitrary executions, and Director of the Institute for International and Comparative Law in Africa (ICLA) at the University of Pretoria. He was recognized internationally as a leading expert in the field of international human rights law, including right to life issues and regional human rights mechanisms, and published widely on these matters.