John Adair (author)
John Eric Adair (18 May 1934 – 1 November 2025) was a British academic who was a leadership theorist and author of more than 40 books (translated into 18 languages) on business, military and other leadership. == Life and career == Adair was born in Luton and educated at St Paul's School before undertaking his national service as a second lieutenant in the Scots Guards from 1953 to 1955.