McPherson is an American scientist, professor emeritus of natural resources and ecology and evolutionary biology at the University of Arizona.
He is known for the idea of Near-Term Human Extinction (NTHE), a term he coined about the likelihood of human extinction by 2030.McPherson's career as a professor began at Texas A&M University, where he taught for one academic year.
He taught for twenty years at the University of Arizona, and also taught at the University of California-Berkeley, Southern Utah University, and Grinnell College.
McPherson has served as an expert witness for legal cases involving land management and wildfires.
He has published more than 55 peer-reviewed publications.
In May 2009, McPherson began living on an off-grid homestead in southern New Mexico.
He then moved to Belize in July 2016.
He moved to New York in October of 2018.In November 2015, McPherson was interviewed on National Geographic Explorer with host Bill Nye.
Andrew Revkin in The New York Times said McPherson was an "apocalyptic ecologist ...
who has built something of an 'End of Days' following." Michael Tobis, a climate scientist from the University of Wisconsin, said McPherson "is not the opposite of a denialist.
He is a denialist, albeit of a different stripe." David Wallace-Wells writing in The Uninhabitable Earth (2019) called McPherson a "climate Gnostic" and on the "fringe," while climate scientist Michael E.