In this book, volume 1 of 3 about Human Development and the Imagination, the concept of the imagination is front and center in chapters 1 to 4 as its historic origins in Hellenic Philosophy are traced through the field of Philosophical Ethics up through more contemporary times. In doing so, these chapters provide the first of many interfaces between the imagination and the process of human development. Then, in Chapters 5 to 14, the study of the imagination reduces to Psychology's domain, and is carried forward as the Life and Times of the Aesthetic Imagination. These chapters promote a psychologically founded understanding of the imagination, consistent with the tenets of cognitive science. The chapters conjoin, in evolving scope, the imagination and the developmental process. In so doing this process sequences a major developmental postulate and ten sub-postulates; these chapters enclose various developmental markers, such as the "Child as Creative Picture-Maker," "Modal Logic," "the Narrative Self," and "Style."