Anchored by the normative framework, this book aims to clarify the basis for individual criminal liability for persons who finance entities that perpetrate core crimes. The objective of this monograph is to clarify the rules to enable international courts and tribunals to identify the extent to which individual criminal liability attaches to the financing of core crimes, as well as the legal basis for such liability. By clarifying the criminal liability of individual who finance entities that perpetrate core crimes, this book also seeks to clarify the mental elements of the mode of liability of aiding and abetting. This is achieved through a thorough analysis of the applicable rules in the international arena, as well as through the comparative analysis.