Robert Kegan (born August 24, 1946) is an American developmental psychologist, author, and consultant. He was the William and Miriam Meehan Professor in Adult Learning and Professional Development at Harvard Graduate School of Education, where he taught for forty years until his retirement in 2016. Additionally he was the Educational Chair for the Institute for Management and Leadership in Education and the Co-director for the Change Leadership Group. He is a licensed psychologist and practicing therapist, has lectured widely to professional and lay audiences, and consults in the area of professional development and organization development. https://en.wikipedia.org/wiki/Robert_Kegan Books: Evolving Self, In Over Our Heads, How the Way We Talk Can Change the Way We Work, An Everyone Culture.