In recent years, April has often been described as the month of genocidal mourning for Armenians, Jews and Rwandans. Today we read the stark headlines and watch the horrific images of thousands of Ukrainian civilians killed by Russian armed forces in Moscow’s war of aggression against Kyiv. So many unarmed ordinary citizens targeted in Bucha, Mariupol and other cities. We agonize as to how and why such malevolent acts can occur in the 21st century.