Elliott Jaques

Elliott Jaques (January 18, 1917 – March 8, 2003) was a Canadian psychoanalyst and organizational psychologist, known for developing the notion of requisite organization from his 'stratified systems theory', running counter to many others in the field of organizational development.

Born in Toronto, Ontario, Jaques was educated at University of Toronto and studied medicine at Johns Hopkins University before receiving his Ph.D in social relations from Harvard University. During World War II, he moved to England where he remained after the war, studying under British psychoanalyst Melanie Klein. He was a founding member, in 1946, of the . In 1964, he founded the School of Social Sciences at Brunel University where he became a professor and head of the school, and of its self-financing research and consultancy unit, the Brunel Institute of Organisation and Social Studies (BIOSS).

The concept of the mid-life crisis was introduced by Jaques in 1965. His development approach to organizational development makes him one of the early contributors to positive adult development.

He died in Gloucester, Massachusetts in 2003.

Jaques developed a system and structural hierarchical framework of requisite organization from his 'stratified systems theory', running counter to many others in the field of organizational development.

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