This edited volume provides an account of international relations theory from the perspective of Marxism. The chapters cover realism, liberalism, critical theory, constructivism, post-Modernism, feminism, green theory and post-colonialism and consider the contribution that a historical materialist approach can make in each of these areas of IR. The volume also discusses the question of why Marxism has not had more influence in international relations. The book will appeal to students and scholars across the fields of political theory, international relations, politics and philosophy.