A mass grave behind a church. Bodies of children and families buried under the rubble of a theater where they had been seeking refuge. Streets littered with bodies of civilians who were shot, hands tied behind their backs. Almost every day, the headlines bring news of new violations of international human rights norms and the rules of war in Ukraine, including attacks by the Russian army on hospitals, schools, residential buildings, and even water facilities. Those revelations have also launched daily accusations against Russian President Vladimir Putin and his military of war crimes and illegal aggression, and calls for international investigations and prosecutions. Now a group of Harvard Professors says that the war in Ukraine could be a watershed moment for the evolving notion of meaningful international justice. In a recent Op-Ed, Harvard Kennedy School Professor Kathryn Sikkink and Harvard Chan School of Public Health faculty members Patrick Vinck and Phuong Pham, say it is tim...