'The role of the European judiciary in the process of European integration cannot be overestimated. The achievements of European integration after the second world war are usually analyzed from the perspective of political decisions that were made, initially, by the Founding Fathers and, subsequently, by the political leaders of the European countries. However, in the public debate we very often forget how much we owe to the two supreme jurisdictions of Europe, that is the Court of Justice of the European Union and the European Court of Human Rights. The continuing extension of the competences of the European Union, especially in the field of economic and monetary policy, calls for a new assessment of the nature of the decision-making process at the European level.'From the foreword by Prof. Maciej Szpunar, Advocate General at the Court of Justice of the European Union'The European judiciary - i.e. the Court of Justice of the European Union (CJEU), the European Court of Human Rights (ECtHR) and national courts interpreting and applying European law sensu largo - have shaped [the process of European integration] actively, alongside the Founding Fathers, European nations, European states and their citizens.