Which European and non-European ideas and practices facilitated the shaping of European unity? Or rather, which pursuits led to deadlocks in the cooperation between states? The book seeks answers to these questions by surveying the historical attempts at realizing supranational patterns of governance in Europe since the Middle Ages. The main focus is on the nineteenth and twentieth century organizational models of European unification. The analysis draws on an abundance of historical and legal source material. While the author encourages critical thinking about European integration, the exploration is admittedly based on specific values. Eva Boka claims that the struggle for the humanization of power with its democratic creative force has been the major driver in the development of the system of liberties and the idea of European unity. The analysis of the historical process up to the Lisbon Treaty (2007) with the recognition of common, shared, and supported competences meets the author's set of values to a great extent. The last part of the book examines whether the European Union can serve as a political and economic organizational model for other parts of the world.