Egon Brunswik is one of the most brilliant, creative and least understood and appreciated psychologists/philosophers of the 20th century. This book presents a collection of Brunswik's most important papers together with interpretive comments by prominent scholars who explain the intent and development of his thought. This collection and the accompanying diverse examples of the application of his ideas will encourage a deeper understanding of Brunswik in the 21st century than was the case in the 20th century. The 21st century already shows signs of acceptance of Brunswikian thought with the appearance of psychologists with a different focus; emulation of physical science is of less importance, and positive contributions toward understanding behavior outside the laboratory without abandoning rigor are claiming more notice. As a result, Brunswik's theoretical and methodological views are already gaining the attention denied them in the 20th century. The plan of this book is to provide, for the first time, in one place the articles that show the origins of his thought, with all their imaginative and creative spirit, as well as thoughtful, scholarly interpretations of the development, meaning and application of his ideas to modern psychology. Thus, his views will become more understandable and more widely disseminated, as well as advanced through the fresh meaning given to them by the psychologists of the 21st century.