Unlike much of the existing literature on organised crime, this book is less focused on the problem per se as it is on understanding its implications. The latter, especially in fragile and conflict regions, amount to strategic challenges for the state. Whereas most commentators would agree that criminal activities are harmful, this volume addresses the questions of 'how?', 'for whom?' and, controversially, 'are they always harmful?' The volume is authored by experts with multi-year experience analysing criminal and other non-state activities. They do so through different lenses - conflict and security, development, and technology - engaging academics, practitioners and policy makers. They offer a comprehensive integrated response to the challenges of transnational organised crime beyond traditional law-enforcement driven recommendations.