Mythopoeic thought is a hypothetical stage of human thought preceding modern thought, proposed by Henri Frankfort and his wife Henriette Antonia Frankfort in the 1940s. According to this proposal, there was a "mythopoeic" stage, in which humanity did not think in terms of generalizations and impersonal laws: instead, humans saw each event as an act of will on the part of some personal being. This way of thinking supposedly explains the ancients' tendency to create myths, which portray events as acts of gods and spirits. A physiological motivation for this was suggested by Julian Jaynes in 1976 in the form of bicameralism.
The term means "myth-making" (from Greek muthos, "myth", and poiein, "to make"). A group of Near Eastern specialists used the term in their 1946 book The Intellectual Adventure of Ancient Man: An Essay on Speculative Thought in the Ancient Near East, later republished as the 1949 paperback Before Philosophy: The Intellectual Adventure of Ancient Man. In this book's introduction, two of the specialists, Henri and Mrs. H.A. Frankfort, argue that mythopoeic thought characterizes a distinct stage of human thought that differs fundamentally from modern, scientific thought. Mythopoeic thought, the Frankforts claim, was concrete and personifying, whereas modern thought is abstract and impersonal: more basically, mythopoeic thought is "pre-philosophical", while modern thought is "philosophical". Because of this basic contrast between mythopoeic and modern thought, the Frankforts often use the term "mythopoeic thought" as a synonym for ancient thought in general.
According to the Frankforts, "the fundamental difference between the attitudes of modern and ancient man as regards the surrounding world is this: for modern, scientific man the phenomenal world is primarily an 'It'; for ancient—and also for primitive—man it is a 'Thou'". In other words, modern man sees most things as impersonal objects, whereas ancient man sees most things as persons.
According to the Frankforts, ancients viewed the world this way because they didn't think in terms of universal laws. Modern thought "reduces the chaos of perceptions to an order in which typical events take place according to universal laws." For example, consider a river that usually rises in the spring. Suppose that, one spring, the river fails to rise. In that case, modern thought doesn't conclude that the laws of nature have changed; instead, it searches for a set of fixed, universal laws that can explain why the river has risen in other cases but not in this case. Modern thought is abstract: it looks for unifying principles behind diversity.