Foreign policy analysis is a major part of international relations scholarship, yet many models are ill-equipped to examine the effects of individual leadership on policy. Written by a leading figure in the field, this innovative account challenges traditional views in international relations by theorising the influence of individual leaders on foreign policy change. It examines how and why leaders have shaped policy throughout history, showcasing Obama's Cuba pivot as a prime example. Using an original theoretical approach, this book will appeal to academics and practitioners in foreign policy analysis, international relations and comparative politics.