This Liber Amicorum appears on the occasion of Professor Vera Gowlland-Debbas' retirement from the Graduate Institute. It includes contributions by her colleagues and friends from distinguished universities and international institutions. It covers different fields in which she has excelled. This collective work is divided into three main sections. The first section examines matters concerning the law of the United Nations. The second section is devoted to human rights and international humanitarian law. The third section addresses issues related to law-making, compliance with international law and the peaceful settlement of disputes. The result is a collection of stimulating analysis of most of the topical problems of international law. The contributions are in both English and French.