Vincent Chetail (HEI): Sovereignty and Migration in the Doctrine of the Law of Nations: An Intellectual History of Hospitality from Vitoria to Vattel. From Political Geography, a symposium on Interventions on the State of Sovereignty at the Border. Oded Stark (Bonn): Global Integration and World Migration. Miodrag A. Jovanovic (Belgrade): How to Normatively Theorize Immigration? Demographic Politics in a Constitutional Democracy. Mathias Risse (Harvard): Humanity’s Collective Ownership of the Earth and Immigration. Idealism, realism, and immigration: Phil Parvin reviews Strangers in Our Midst: The Political Philosophy of Immigration by David Miller. Nathan Smith on a world without borders: Richer, fairer, and more free.