There runs through the fundamentalist belief system a deep dread of ambiguity, disorder and chaos. … It fosters a world of binary opposites: God and man, saved and unsaved, the church and the world, Christianity and secular humanism, male and female. These tidy pairings keep life from slipping back into a complicated nightmare. Reality, thus defined, is made predictable and understandable, something deeply comforting to believers who have had trouble coping with the messiness of human existence.. ~ Chris Hedges, American Fascists, p. 83
Black & white thinking ~ to me, this is the core definition of Fundamentalism.
Everything was either/or ~ which, as Hedges points out in his chapter titled “The Cult of Masculinity,” really does simplify the decision-making process and made our otherwise-overwhelming-world neat and tidy and easily comprehensible.