Book excerpt: Modern, high-quality republication of a sociological and social psychology classic. New preface by the author and extensive new Foreword by MIT's Gary Marx. An authorized and quality edition--not just scanned and forgotten like most such reprints today--this book is part of the Classics of the Social Sciences Series by Quid Pro Books. Quality ebook formatting includes linked notes, legible tables, and active TOC. The book's original page numbers from its first printing are embedded for continuity of citations and a class syllabus.