A major aim of the books in this series is to promote psychology's appreciation of the neglected giants in its history. The chapters document the significance of these early contributions, many of them made more than a century ago.

Most of the chapters are revisions of invited addresses delivered at psychological conventions. Several of the authors are students, colleagues, or offspring of their pioneers and all of them are intrigued by the life and work of the psychologists about whom they have written. All of the portraits are informal; on occasion, even humorous. Some are...