Given the controversies and difficulties which preceded the coming into force of the Lisbon Treaty, it is easy to forget that the Treaty is a complex legal document in need of detailed analysis for its impact to be fully understood. Jean-Claude Piris, the Director General of the Legal Service of the Council of the European Union, provides such an analysis, looking at the historical and political contexts of the Treaty, its impact on the democratic framework of the EU and its provisions in relation to substantive law. Impartial legal analysis of the EU's functions, its powers and the treaties which govern it make this the seminal text on the most significant recent development in EU law.An authoritative and informed description of all legal effects of the Treaty of Lisbon, comparing them to the ex-ante situation and helping readers to understand its roots and the consequences of its provisionsContextual legal analysis explains the reasons why the agreed provisions have been adopted and their interdependenceOutlines the workings, limitations and challenges of an organisation which plays an important role in the political, economic and social lives of all Europeans