When They Severed Earth from Sky: How the Human Mind Shapes Myth is a 2004 work by Elizabeth Wayland Barber and Paul T. Barber that examines how preliterate societies encoded information about natural events and observations into mythological narratives. Published by Princeton University Press, the book presents a theoretical framework of cognitive principles governing how myths develop, transmit, and degrade over time. The authors argue that many myths preserve accurate information about geological and astronomical phenomena, functioning as "time capsules" that transmit crucial survival knowledge across millennia before the invention of writing. The work analyzes mythological narratives from various cultures, particularly examining cases where independent geological or archaeological evidence can verify the historical events potentially encoded in myths.
Development and context The book emerged from the authors' research on mythological narratives across multiple cultures over approximately twenty-four years. Elizabeth Wayland Barber, a linguist and archaeologist at Occidental College specializing in prehistoric textiles and Indo-European languages, collaborated with her partner Paul T. Barber, a folklorist at UCLA's Fowler Museum who had previously investigated burial practices and vampire beliefs in "Vampires, Burial, and Death" (Yale, 1988). The project built on Dorothy Vitaliano's geological interpretation of myths in "Legends of the Earth" (1973), which established the field later termed geomythology. Bruce Masse expanded this approach in the 1990s by incorporating astronomical phenomena alongside geological events. The Barbers departed from their predecessors by emphasizing cognitive mechanisms rather than cataloging mythological-geological correspondences. Their framework addressed how preliterate societies encoded observations into transmissible narratives, not merely whether myths contained factual content. The authors analyzed myths from the Pacific Northwest, ancient Greece, Egypt, Mesopotamia, and Northern Europe, selecting cases where independent evidence could verify proposed correlates. The Klamath account of Crater Lake served as their primary test case, as the narrative's volcanic imagery could be compared against the geological record of Mount Mazama's collapse 7,675 years ago. Similarly, their interpretation of Hesiod's Theogony drew on evidence from the Thera eruption (circa 1625 BCE) preserved in ice cores and archaeological sites.
Scholarly context Princeton University Press published the work in 2004 (hardcover) and 2006 (paperback). The December 2004 Indian Ocean tsunami coincidentally demonstrated the survival value of mythologically encoded knowledge when Moken sea nomads and some Phuket islanders evacuated based on traditional narratives about receding waters, while tourists lacking such knowledge remained in danger zones. The book prompted divided scholarly responses. Archaeoastronomers and geologists, including E.C. Krupp of Griffith Observatory, endorsed its methodology. Patrick Nunn cited it as validating his research on Australian Aboriginal narratives encoding sea-level changes over 10,000 years. The authors contributed to L. Piccardi and W.B. Masse's "Myth and Geology" (Geological Society London, 2007) and published refinements in the Journal of Cognitive Historiography (2022).
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