This book is written in memory of Avril McDonald, who passed away in April 2010. Avril was an inspired and passionate scholar in the fields of international humanitarian law, international criminal law, human rights law and law in the field of arms control and disarmament. What in particular made Avril's work special was her strong commitment to the human aspects throughout. Fourteen prominent scholars and practitioners have contributed to this book, which contains a rich variety of topics in her fields of expertise. The common thread is that they deal with the human perspectives in their relevant area of expertise. They concentrate on the impact of the developments in international law on humans, whether they are civilians, victims of war or soldiers. This human perspective of law makes this book an appropriate tribute to Avril McDonald and at the same time a unique and valuable contribution to international legal research in present society.