Rosalie Silberman Abella is the Samuel and Judith Pisar Visiting Professor of Law at Harvard Law School. She served as a justice of the Supreme Court of Canada from 2004 until her mandatory retirement in 2021. The International Court of Justice is about to hear arguments in a case, brought by South Africa – the country that in 2015 refused to send former Sudanese president Omar al-Bashir of Sudan to the International Criminal Court to stand trial for his contribution to war crimes in Darfur, and instead facilitated his return to Sudan where he continued his crimes – that alleges...