psychohistorian means one who is involved in the field of psychohistory. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “psychohistorian” is a great word
PSYCHOHISTORIAN — [Noun] A practitioner of psychohistory, which applies psychological theory and methods to the study of history and collective human behavior. Formed within English by compounding the combining form psycho- (from Greek psykhē, meaning "soul, mind") and the noun historian (from Latin historia, meaning "inquiry, history"). First attested in 1929. Unlike a historian, who traces the documented sequence of events, or a psychologist, who diagnoses the individual mind, the psychohistorian seeks the neurosis in the nation, the trauma in the timeline, the collective unconscious in the chronicle. It is diagnosing a century’s aggression as societal repression, hearing the subconscious whisper in a statesman’s diary, or plotting the fever chart of an empire’s rise and fall—a discipline built on the haunting premise that the past is not merely a record, but a patient on an endless couch.
Etymology
From psycho- + historian.
noun
- One who is involved in the field of psychohistory.