Oral Tradition as a Historical Source

The Homeric Question — how a poem the length of the Iliad or Odyssey could have been composed and transmitted before Greek writing was in wide use — had a real, field-tested answer by the mid-20th century. Milman Parry, and later his student Albert Lord, traveled to Yugoslavia to study living South Slavic guslars: oral epic poets who improvised lengthy sung compositions in performance, accompanied by a single-stringed instrument. Parry identified the mechanism making this possible — the "formula," a phrase-length building block reused across singers and poems under matching metrical conditions, not memorized verbatim but drawn on as shared, flexible inheritance.

Geographer Patrick Nunn and linguist Nicholas Reid gathered Aboriginal Australian oral traditions from 21 separate coastal locations, each describing a time when the coastline extended much further out than it does today, before the ocean rose and covered it. For each location, the researchers calculated the minimum depth of water that would need to be removed for the story's own described landscape to have been literally dry — then checked that figure against the independently established post-glacial sea-level curve for Australian waters. The stories corresponded to real inundation events dated between roughly 7,250 and 13,070 years ago.

At the turn of the 20th century, as the British extended colonial control over northern Ghana, anthropologists recorded the Gonja people's own founding tradition: their ancestor Jakpa had seven sons, matching the seven divisional chiefdoms whose rulers were eligible for the supreme office. Around the same period, two of those seven divisions genuinely disappeared — one absorbed into a neighboring division for having backed an invader, another lost to a British administrative boundary change.