Organized criminal actors generate trillions of dollars in earnings every year – while deeply undermining peace and security. Organized crime generates and contributes to armed violence all around the world, in the context of both armed conflict and other situations of violence. The human and humanitarian costs are astronomical: countless lives lost and disappeared, not to mention lost livelihoods, restricted access to essential services, and corrosion of institutions. This edition of the Review examines the intersections among organized crime, armed conflict and other situations of violence, looking at the vexing legal, ethical and operational questions this nexus raises.