This is an ambitious book. I began to write about what in continental Europe is known as the “constituent power” from an orthodox constitutional legal scholarly perspective and I suddenly found myself writing on the origins of public power in constitutional democracies: a comprehensive investigation. Indeed, in pursuing the topic on constitutional creation I have mainly followed the contributions provided by authors trained in the legal tradition, but my analysis also draws on information and insights from a wide range of scholarly disciplines, most notably: history, historical sociology, economics, and political philosophy. I have, in fact, tried to imitate the approaches of such constitutional legal theorists that I fnd more appealing and that I admire most, true giants of my discipline such as Bruce Ackerman, Peter Häberle, and Joseph Weiler, to whom I shall be eternally in debt.