Religious and philosophical traditions across Asia, the Mediterranean and the Middle East recorded who taught whom, often across dozens of generations. The lists were practical instruments rather than decoration.
A lineage answers a verification problem
Before printing and archives, a claim to teach carried no external proof. Anyone could assert that they held a tradition, and there was no register against which the assertion could be checked.
Naming a chain of teachers back to a recognised source turned the claim into something examinable. Each link could in principle be corroborated by people who had known the individuals named.
The structure resembles a chain of custody. What is being certified is not that a teaching is true but that it arrived intact through people who could be identified.
Transmission included more than words
What passes along a lineage is typically described as including practice, manner, timing and judgement, none of which reduce to text.
A student learns when a teaching applies and when it does not, which cases are exceptions and how a difficult situation was handled by someone with longer experience.
This is why traditions that possessed complete written corpora still insisted on a living teacher. The book preserved the words and was never considered sufficient on its own.
Authorisation was usually a formal act
Many lineages mark the point at which a student may teach with a defined ceremony, a document, a transmitted object or a public examination.
The formality matters because it distinguishes a person who has studied from a person authorised to represent the tradition, and those are different statuses.
Where authorisation is informal or contested, disputes about legitimacy tend to follow within a generation, and the history of most large traditions contains several such episodes.
Lineages fork and are reconstructed
Chains rarely stay single. Students of one teacher develop differing emphases, and their own students inherit the difference, producing branches with a shared root.
Some lists were also compiled retrospectively, assembled by later generations to connect an existing practice to an authoritative origin.
Historians therefore treat these documents as evidence about the period that compiled them as much as about the period they describe, without concluding that a reconstructed list is necessarily false.
The model persists in modern settings
Contemporary teachers of meditation, yoga and traditional medicine still commonly state whom they trained under, and students still ask.
The question is doing the same work it always did, since certification bodies vary widely and a named teacher gives a prospective student something concrete to investigate.
It remains an imperfect signal. A lineage establishes where a teaching came from, not whether the particular person in front of you teaches it well or safely.