Uncover the critical legal limits on Security Council veto power amidst atrocity crimes. Jennifer Trahan delves into how UN Charter principles, jus cogens, and international conventions bind permanent members, even in the face of genocide, war crimes, and crimes against humanity. This insightful analysis highlights instances where vetoes have obstructed crucial interventions, such as in Syria and Myanmar, and explores the ongoing debate challenging the legality of such practices. An essential resource for international law students, legal professionals, and anyone interested in global governance and preventing mass atrocities, offering vital perspectives on accountability.