This book is the first to address the multi-faceted influence of the global financial crisis on the national constitutions of the countries most affected. By tracing the impact of the crisis on formal and informal constitutional change, sovereignty issues, fundamental rights protection, regulatory reforms, jurisprudence, the augmentation of executive power, and changes in the party system it addresses all areas of the current constitutional law dialogue and aims to become a reference book with regard to the interaction between financial crises and constitutions. The book includes contributions from prominent experts on Greece, Hungary, Iceland, Ireland, Italy, Latvia, Portugal, Spain, the UK, and the USA providing a critical analysis of the effects of the financial crisis on the constitution. The volume's extensive comparative chapter pins down distinct constitutional reactions towards the financial crisis, building an explanatory theory that accounts for the different ways constitutions responded to the crisis. How and why constitutions formed their reactions in the face of the financial crisis unravels throughout the book.