John Adair (author) at the University of Exeter from 1990 to 2000. He is currently an Emeritus Fellow of the Windsor Leadership Trust where he regularly speaks on Leadership development programmes. Since 2006, he has been Honorary Professor of Leadership at the China Executive Leadership Academy in Pudong. In 2009 he was appointed Chair of Leadership Studies United Nations System Staff College in Turin. He is President of Adair International. John Adair (author) Professor John Eric Adair (born 18 May 1934) is a British academic who is a leadership theorist and author of more than forty books (translated into eighteen languages) on business,
Kurt Lewin as scientifically valid entities. It had been said by skeptics that the actions of groups were nothing more than those of its members considered separately. Lewin applied his interactionism formula, "B" = "ƒ"("P", "E"), to explain group phenomena, where a member's personal characteristics ("P") interact with the environmental factors of the group, ("E") its members, and the situation to elicit behaviour ("B"). Given his background in Gestalt psychology, Lewin justified group existence using the dictum "The whole is greater than the sum of its parts". He theorized that when a group is established it becomes a unified system with supervening