Ideas By Jeffrey Sonnenfeld , Barry McCaffrey , James Clapper and Stephen Henriques Updated: December 31, 1969 7:00 PM EST | Originally published: October 24, 2024 1:00 PM EDT Jeffrey Sonnenfeld is the Lester Crown Professor of Leadership Practice and President of the Yale Chief Executive Leadership Institute. He has created the world’s first school for incumbent CEOs and has been an informal advisor to five U.S. Presidents, as well as studied top leadership across sectors for over 40 years.