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Jack David Zipes (born 1937) is a professor emeritus of German, comparative literature, and cultural studies, who has published and lectured on German literature, critical theory, German Jewish culture, children's literature, and folklore. In the latter part of his career he translated two major editions of the tales of the Brothers Grimm and focused on fairy tales, their evolution, and their social and political role in civilizing processes. According to Zipes, fairy tales "serve a meaningful social function, not just for compensation but for revelation: the worlds projected by the best of our fairy tales reveal the gaps between truth and falsehood in our immediate society." His arguments are avowedly based on the critical theory of the Frankfurt School and more recently theories of cultural evolution.