Book excerpt: Defining a “historic transition” means understanding how the complex system of intellectual, social, and material structures formed that determined the transition from a certain “universe” to a “new universe,” where the old explanations were radically rethought. In this book, a group of historians with specializations ranging from the sixteenth to the twentieth centuries and across political, religious, and social fields, attempt a reinterpretation of “modernity” as the new “Axial Age.”