Dr. Robert Kegan is the Meehan Professor of Adult Learning and Professional Development at the Harvard University Graduate School of Education. The recipient of numerous honorary degrees and awards, his thirty years of research and writing on adult development have contributed to the recognition that ongoing psychological development after adolescence is at once possible and necessary to meet the demands of modern life. His seminal books, The Evolving Self and In Over Our Heads, have been published in several languages throughout the world. Dr. Lisa Lahey leads the Personal Mastery component of a path-breaking new doctoral program at the Harvard University Graduate School of Education, designed to produce the public-sector equivalent of the "turnaround specialist.? A developmental psychologist and educator, and coauthor of Change Leadership, she led the research team that created the developmental diagnostic, now used around the world, for assessing adult meaning-systems.