The lectures survey the territorial settlement of postwar Europe, placing each contentious boundary and question in its historical context while assessing practical treaty solutions. Essays examine frontier disputes and related political, economic, and humanitarian problems across regions including Belgium and Denmark, Alsace-Lorraine, the Rhineland and the Saar, the rebirth of Poland, the dissolution of Austria-Hungary and its successor states, the Adriatic littoral and Fiume, and the Balkan rearrangements. Attention is given to conference methods, organization, maps, and bibliographical guidance, with emphasis on translating historical claims into negotiable provisions for durable peace.