This course provides an overview of core ethical problems in international politics, with special emphasis on the question of what demands justice imposes on institutions and agents acting in a global context. It is divided into three sections. The first investigates the content of global justice, and comprises of readings from contemporary political theorists and philosophers who write within the liberal contractualist, utilitarian, cosmopolitan, and nationalist traditions. The second part looks at the obligations which global justice generates in relation to a series of real-world issues of international concern: global poverty, human rights, poverty and development, climate change and natural resources, international migration, and the well-being of women. The final section asks whether a democratic international order is necessary for global justice to be realized.