Offering a unique perspective on an overlooked subject – the relationship between time, change, and lawmaking – this edited collection brings together world-leading experts to consider how time considerations and social, political and technological change affect the legislative process, the interpretation of laws, the definition of the powers of the government and the ability of legal orders to promote innovation. Divided into four parts, each part considers a different form of interaction between time and law, and change. The first part offers legal, theoretical and historical perspectives on the relationship between time and law, and how time shaped law and influences legal interpretation and constitutional change. The second part offers the reader an analysis of the different ways in which courts approach the impact of time on law, as well as theoretical and empirical reflections upon the meaning of the principle of legal certainty, legitimate expectations and the influence of law over time. The third part of the book analyses how legislation and the legislative process addresses time and change, and the various challenges they create to the legal order. The fourth and final part addresses the complex relationship between fast-paced technological change and the regulation of innovations.