This book is the framework for a new theory of moral development that combines components from a variety of existing theories of human development with the author’s original research. The detailed description of the theory is divided into five sections: (1) foundations of development, (2) long-term memory, (3) the influence of environments, (4) working memory, and (5) progressions and stages of development. Each chapter concludes with an exercise demonstrating the application of the new theory, and the final section of the book employs the theory as a lens through which the moral development of four historic figures can be viewed afresh.