This book highlights Europe's democracy problem. The most prominent argument running throughout is that the EU and its decision-making processes have become over-constitutionalized. This is due to the constitutionalization ?of European treaties, by raising them to the eminence of a constitution which in turn detaches the EU's executive and judicial institutions from member states and the EU itself.

The book also asserts that currently the EU does not have enough sources of legitimation to uphold itself, surviving solely on the legitimation provided by member states. One popular remedy is the suggestion of 'parliamentarization' of the EU, giving the European Parliament the powers typically possessed by national parliaments as a means of heightening its legitimation. This is criticized by Grimm as expanding the Parliament's powers would not change the effects of over-constiutionalization as the Parliament is inferior to the constitution.

In order to reduce the EU's legitimacy deficit, Grimm makes several recommendations. The repoliticization of the decision-making processes, which can be achieved by reducing treaties to the capacity necessary for their constitutional function; the reinvigoration of European Parliament elections, by having 'Europeanized' parties to increase engagement with European society and give voters the opportunity to more immediately influence European politics; and a new division of powers based on subject matter to restrain European expansionism, reserving particular areas of policy to the responsibility of member states even if this affects the common market.