Magda B. Arnold (1903-2002), is a pioneering figure of 20th Century emotions research whose pathbreaking and comprehensive theory of emotion is an ambitious fusion of research in cognition, motivation, neuroscience, and personality. Contributors' reviews and critiques of Arnold's work offer a panorama of 20th Century emotion science, revealing where progress has been made, particularly in understanding appraisal processes, and highlighting issues that emotions researchers continue to grapple with, especially questions concerning emotion and value, optimal human functioning, and the...