When W. H. Freeman originally published this book in 1983, the scientific study of relationships was in its childhood. "Relationship science" has since become an established endeavor in psychology, sociology, and other social and behavioral science disciplines - complete with its own organizations, journals, book series, handbooks, and sourcebooks. A lengthy new introduction by Ellen Berscheid and Harold Kelley documents the evolution of the field.
an American social psychologist and professor of psychology at the University of California, Los Angeles. His major contributions have been the development of interdependence theory (with John Thibaut), the early work of attribution theory, and a lifelong interest in understanding close relationships processes. A Review of General Psychology survey, published in 2002, ranked Kelley as the 43rd most cited psychologist of the 20th century.