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statementVerified

Tetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name

The 1940 Loeb Tetrabiblos (Robbins) prints a four-book astrological treatise as Ptolemy’s. In the causal graph this event strengthens Institutional Corruption, a driver that strengthens Political corruption index — a worsening welfare path.

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The 1940 Loeb Tetrabiblos (Robbins) prints a four-book astrological treatise as Ptolemy’s.

Context

Split any later history-of-science access row. This stores the printed claim that heavenly geometry licenses earthly fate. Attribution of the Greek text to the Almagest author is the received scholarly position, not a papyrus autograph in this date field.

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

Conventional floruit is the mid-2nd century CE in Roman Alexandria.

Who was responsible

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

  • Ptolemy

    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.

    1. FactTetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name
    2. strengthensDriverInstitutional Corruption
    3. strengthensIndicators (3)Political corruption index
    Worsening path

    impact weight 0.5 · Effect from 1 June 150 · verified

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Perseus — Ptolemy, Tetrabiblos (Robbins)Perseus Digital Library / Tufts · High credibility · verified
  2. 2.Loeb Classical Library — Ptolemy, TetrabiblosHarvard University Press · High credibility · verified
What the sources establish

Driver institutional-corruption is attached because the Significance sentence names a mechanism from Tetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name at 0150-06-01, not because a standing driver list needed coverage. Official page: https://www.hup.harvard.edu/books/9780674994799 (opens in a new tab). Independent page: https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0168 (opens in a new tab).

Causal path

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

  1. ActorPtolemy
  2. contributed toFactTetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name
  3. strengthensDriverInstitutional Corruption
  4. strengthensIndicatorPolitical corruption index

Cite this page

Factrail. (2026). Tetrabiblos presents a completed judicial astrology of natal and mundane prediction under Ptolemy’s name. Factrail. https://factrail.ai/facts/pto-tetrabiblos-astrology

https://factrail.ai/facts/pto-tetrabiblos-astrology

Accessed 16 October 2026.

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

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