One who is involved in the field of psychohistory.(noun)
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Use "psychohistorian" in a sentence
"Finally, the reader is entitled to know that Mr. Mazlish's career as a "psychohistorian" is more extensive than I had the space to indicate in my essay."
"Anyway, Dornick is there to accept a job with the famous mathematician / psychohistorian Hari Seldon."
"Those "few fortunate children" need to compound the "late historical achievement" by enlightening others if, as another psychohistorian, Jerrold Atlas, writes, they wish to end the "race between too slowly improving childrearing and too fast evolving destructive technology.""