In this book, fascinating autobiographical accounts by leading scholars in a variety of fields and disciplines provide a rich introduction to the art and science of complexity and systems thinking. We learn how the authors' interest in complexity thinking developed, the key figures and texts they encountered along the way, the experiences that shaped their path, their major works, and their personal journeys. This volume serves as an introduction to complexity as well as a vivid account of the personal and intellectual development of important scholars.This book was originally published as a special issue of World Futures.