John Plant (born 1954 in New Haven, Connecticut) is an American ethnologist, biologist and expert on the culture of the Plains Indians.
Plant studied anthropology at Windham College in Putney (Vermont, USA), graduating with the B.A.
He continued the study of biology at the Albert-Ludwigs-Universität im Breisgau (Germany), acquiring the Diplom degree (1985).
(1994) under the supervision of Prof. Ulrich Köhler and Dr. Lothar Käser at the Institut für Völkerkunde of the Universität Freiburg (Germany).
John Plant examined both of these ethnological phenomena among the Plains Indians, in particular the following tribes: The contraries of the Plains Indians were individuals devoted to an extraordinary life-style in which they consistently and continually did the opposite of what others normally do.