This book investigates the legitimacy deficits of two potentially conflicting legal systems, namely Public and Islamic international law. It discusses the challenges that Public international law is being presented within the context of its relationship with Islamic international law. It explores how best to overcome these challenges through a comparative examination of state practices on the use of force. It highlights the legal-political legacies that evolved surrounding the claims of the legitimacy of use of force by armed non-state actors, states, and regional organizations. This book...