INVENTION · DISCOVERY · ACCESS
The technology tree.
Follow an idea from its first evidence to its later uses. See who built it, who encountered it and who could actually use it.
Book layers and event-type filters
Technology facts use the atlas’s “technology” event type. Your other filters remain in links back to the atlas.
Explore the whole technology tree
Read connections from left to right. Columns show dependency depth, not dates or a ranking of sophistication. Choose a technology to inspect its connections and claims below.
How to read the tree · sources & background
READ THE CONNECTION, THEN THE EVIDENCE
A tree of supported connections.
A line means the cited passage describes one technology enabling, supplying or developing into another. It does not mean that every use requires it. Unconnected entries remain in the catalogue; chronology alone never creates an arrow.
Origin records invention or inherited foundations. Discovery records an encounter or identification. Development records an improvement. Access names an evidenced recipient or restriction. Use shows possession or observation without assuming invention. Plans and proposals remain labelled as such.
The catalogue covers the technologies identified in a systematic pass through all six supplied books. It is a research index, not a claim that every incidental device is captured. “No access claim in this selection” means unknown here, not that nobody had access. Audio claims are machine-transcript evidence with listening checks pending.
Names and claims appear only after their cited chapter. Connections require both endpoints and the connection’s evidence to be visible. Filters and exports use the same rule. Full books and transcripts stay private; the public static data is downloadable, so spoiler controls protect the interface rather than restrict data access.