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A three-book Geography under Eratosthenes’s name is later quoted by Strabo as a completed treatise

Strabo’s Geography, as Perseus and LacusCurtius print it, quotes and criticises a three-book geographical treatise under Eratosthenes’s name, including a division of the inhabited world. Colonial reuse of later Ptolemaic maps is not this book. In the causal graph this event strengthens Digital Learning Access, a driver that weakens Learning Poverty Rate (low- and middle-income countries) — an improving welfare path.

Sources: [1][2]

Read the full account

Strabo’s Geography, as Perseus and LacusCurtius print it, quotes and criticises a three-book geographical treatise under Eratosthenes’s name, including a division of the inhabited world. Eratosthenes did not typeset Jones.

Context

Map-drawing is stored separately. Colonial reuse of later Ptolemaic maps is not this book.

Eratosthenes’s documented role is bounded by other offices and collaborators named in the sources below.

Conventional years are c.276–c.194 BCE. Almost no autograph survives. Cleomedes, Strabo, Nicomachus, and later encyclopedias are the public file. Classroom globe reconstructions are not his acts. Contribution is complex.

Why it matters

Quotation is not a licence to invent chapters.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Eratosthenes

    Person

    Direct responsibility

    responsibility level 0.4 · verified

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Britannica — EratosthenesEncyclopaedia Britannica · High credibility · verified
  2. 2.Perseus — Strabo, Geography (Jones)Perseus Digital Library / Tufts · High credibility · verified
What the sources establish

Perseus’s Strabo and Britannica independently describe Eratosthenes’s Geography as a lost work known through later quotation.

Established: later geography names a three-book Eratosthenic Geography. Not established: a complete table of contents in his hand, or that Strabo’s criticisms are Eratosthenes’s own words.

Eratosthenes did not file a later UNESCO form, a later Loeb colophon, or a later museum label as a personal act. Keep Strabo’s imperial date as the carrier.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorEratosthenes
  2. contributed toFactA three-book Geography under Eratosthenes’s name is later quoted by Strabo as a completed treatise
  3. strengthensDriverDigital Learning Access
  4. weakensIndicatorLearning Poverty Rate (low- and middle-income countries)

Cite this page

Factrail. (2026). A three-book Geography under Eratosthenes’s name is later quoted by Strabo as a completed treatise. Factrail. https://factrail.ai/facts/era-geography-three-books

https://factrail.ai/facts/era-geography-three-books

Accessed 16 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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