This article presents an account of sovereignty as a concept that signifies in jural terms the nature and quality of political relations within the modern state. It argues, first, that sovereignty is a politico-legal concept that expresses the autonomous nature of the state’s political power and its specific mode of operation in the form of law and, secondly, that many political scientists and lawyers present a skewed account by confusing sovereignty with governmental competence. After clarifying its meaning, the significance of contemporary governmental change is explained as one that, in certain respects, involves an erosion of sovereignty.

This paper provides a dialectical-historical description of the EU's constitutional discourse. It is argued that the early Community's member state blind principle of justice implied the notion of a European political community and led to the establishment of fair procedures for decision making. This coming of age of an encompassing European constitutional narrative of justice and fairness prompted the question of the demarcation between the political role of the European political community and that of member states' political communities. The answer proved to be subsidiarity. However, subsidiarity has introduced national conceptions of justice in the Union's constitutional discourse, at the risk of making European justice dependent on national conceptions of justice.