Martin Luther King, Jr. once said 'the arc of the moral universe is long, but it bends toward justice.' Testing the optimism of that claim were the many fits and starts in the struggle for human rights that King helped to catalyze. The same is true of other events in the last half-century, from resistance to apartheid and genocide to equal and fair treatment in domestic criminal justice systems, to the formation of entities to prevent atrocities and to bring their perpetrators to justice. Within this display of myriad arcs may be found the many persons who helped shape this half-century of global justice-and prominent among them is William A. Schabas. His panoramic scholarship includes dozens of books and hundreds of articles, and he also has served as an influential policymaker, advocate, and mentor. This work honours William A. Schabas and his career with essays by luminary scholars and jurists from Africa, Asia, Europe, and the Americas. The essays examine contemporary, historical, cultural, and theoretical aspects of the many arcs of global justice with which Professor Schabas has engaged, in fields including public international law, human rights, transitional justice, international criminal law, and capital punishment.