Marilyn Ferguson (April 5, 1938 in Grand Junction, Colorado – October 19, 2008) was an American author, editor and public speaker, best known for her 1980 book The Aquarian Conspiracy and its affiliation with the New Age Movement in popular culture.
A founding member of the Association of Humanistic Psychology, Ferguson published and edited the well-regarded science newsletter Brain/Mind Bulletin from 1975 to 1996.
She eventually earned numerous honorary degrees, served on the board of directors of the Institute of Noetic Sciences, and befriended such diverse figures of influence as inventor and theorist Buckminster Fuller, spiritual author Ram Dass, Nobel Prize-winning chemist Ilya Prigogine and billionaire Ted Turner.
Ferguson's work also influenced Vice President Al Gore, who participated in her informal network while a senator and later met with her in the White House.