Early in his career, Yergin worked as a contributing editor for New York magazine.[1] Through 1980, he was a lecturer at the Harvard Business School and, until 1985, a lecturer at Harvard's Kennedy School of Government.[2][3] Yergin's first book, Shattered Peace: The Origins of the Cold War and the National Security State (1977),[4] was partly based upon his doctoral dissertation and focused on the origins of the Cold War.[4] It was named "best book of the year" by the National Historical Society.[citation needed]