About John Macdonald
Lived 1920 – 2007 (aged 87). John Macdonald was a New Zealand psychiatrist.
John Marshall Macdonald (9 November 1920 – 16 December 2007) was a forensic psychiatrist most renowned for his theory of the Macdonald triad of sociopathic traits and his profiling of serial killers. He published approximately a dozen books in his field.
Macdonald completed a Doctor of Medicine degree at the University of Otago in 1967, with a thesis titled The Threat to Kill.
Don’t just read it —
keep it.
Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.
- E-book
- Audio
- Video
Instant download · yours to keep · every purchase keeps this site free
Important facts
People in John Macdonald's life
Named in this biography and alive at the same time
Related people
Same field, nearest in time
Contemporaries
People whose lives overlapped John Macdonald's
Frequently asked questions
Who was John Macdonald?
New Zealand psychiatrist (1920–2007)
When was John Macdonald born?
John Macdonald was born on 7 November 1920 in Dunedin.
When did John Macdonald die?
John Macdonald died on 16 November 2007.
What was John Macdonald's occupation?
John Macdonald was a psychiatrist.
What nationality was John Macdonald?
John Macdonald was New Zealand.
Sources & further reading
· DBpedia: John Macdonald (psychiatrist)
Cite this page
APA: Biography.guide. (2026). John Macdonald. https://biography.guide/john-macdonald/
MLA: "John Macdonald." Biography.guide, https://biography.guide/john-macdonald/.
Chicago: "John Macdonald." Biography.guide. https://biography.guide/john-macdonald/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
Page generated 2026-09-27 05:08 UTC