For every King Arthur or Roland still read today, another hero of ancient literature may have been lost forever, according to a new analysis of medieval text family trees. Before the printing press, scribes copied manuscripts by hand, introducing errors and innovations akin to genetic mutations. These changes allow philologists to build evolutionary trees, or stemmata, from surviving copies.
Such trees, however, only reflect the history of extant texts. They cannot account for works that have been completely lost, leaving a significant gap in the literary record. The new research quantifies this loss, suggesting that about 60% of medieval narratives have disappeared over centuries.
The study relies on statistical models that compare the branching patterns of surviving manuscripts to predict the original diversity. By analyzing these stemmata, researchers estimate the proportion of texts that never made it to the present day. This approach draws parallels to evolutionary biology, where genetic trees can infer extinct species.
The findings challenge the assumption that surviving manuscripts represent the full breadth of medieval literature. Scholars may need to reconsider the cultural significance of lost works and their influence on surviving texts. The method could also apply to other handwritten traditions, such as classical or religious manuscripts.
Critics caution that the estimate depends heavily on the completeness of existing manuscript collections. More research is needed to validate the model against known historical records.