This book explores how the EU Treaties evolved, placing them within the context of their time. It illustrates how they reacted to the social, political and economic realities of their age, but also how they addressed future and foreseeable challenges. This helps to fully demonstrate the current constitutional landscape and to suggest how it might develop going forward. The book provides a comprehensive explanation of the development of EU policy from the Treaty of Rome in the 1950s to the Treaty of Lisbon in 2009, which led to a tighter union and ultimately to Brexit. A fascinating insight into the past, present and future of the European Union.