What Was Not Transmitted

This series has followed what travelled: Greek science through Syriac into Arabic, corrected and extended, then into Latin through Toledo, and into the university curriculum. The final question is what did not make the journey, because the losses were not random.

Start with the plainest case. Aristotle came through almost complete. Plato did not. Only a fragment of the Platonic corpus was available in Latin before the fifteenth century, principally part of the Timaeus. The reason is largely practical: Aristotle was useful for logic, natural philosophy and medicine, and the translation programmes were driven by use.

Consequential things follow from that. European scholastic thought was built on the Aristotle available and reasoned within his framework for three centuries. When Plato arrived in bulk in the fifteenth century, through Byzantine scholars and Ficino, the effect was disruptive precisely because a whole alternative had been missing.

Second selection. The Greek mathematical tradition came through strongly. Greek literature, drama and history came through much more weakly. Nobody in Baghdad commissioned a translation of Sophocles. The material selected was the material with an application, and poetry does not calculate an inheritance or fix a prayer time.

Third, and least discussed: the practical and craft knowledge of every stage travelled worst of all. Techniques held by working artisans, in workshops, transmitted by apprenticeship and rarely written, do not appear in translation programmes at all. Roman concrete is the standard example, and there are many others.

That is the same category the boats belong to and the wayfinders. Procedural knowledge held in bodies, requiring a person to teach a person, with a transmission window of about one generation.

So the shape of what we inherited is not a sample of what existed. It is the intersection of three filters: written down at all, written on something durable, and useful enough to somebody with money that they paid for it to be copied into another language.

Nothing about that intersection tracks importance. It tracks patronage, applicability and material science. A body of work could be excellent, widely held and completely lost because it was practical rather than theoretical, or because its practitioners did not write.

Which reframes the whole question this archive keeps asking. The interesting suppression is not usually a decision to destroy something. It is the accumulated effect of a long series of decisions about what was worth the cost of copying, made by people who were not thinking about posterity at all.

The Index is easy to see because somebody printed the list. The other filter published nothing and removed far more.