Teubner issues Hermann Usener’s Epicurea as the fragment corpus
In 1887 Teubner at Leipzig issued Usener’s Epicurea, still the fullest fragment collection. 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.
Read the full account
In 1887 Teubner at Leipzig issued Usener’s Epicurea, still the fullest fragment collection. Epicurus did not edit it. Scan copies now circulate via research archives.
Context
Fragments had been scattered in hostile quotations. A numbered corpus made citation possible and also risked treating scraps as a system. Philology is the gain; over-system is a later error.
Epicurus is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.
Why it matters
A Teubner fragment book is a scholarly access path, not a recovered autograph library.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
Epicurus
PersonDirect responsibility
responsibility level 0.28 · verified
Garden founder as named in later editions and finds. Printers, excavators, and editors publish the instrument.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactTeubner issues Hermann Usener’s Epicurea as the fragment corpus
- strengthensDriverDigital Learning Access
- weakensIndicators (3)Learning Poverty Rate (low- and middle-income countries)
impact weight 0.5 · Effect from 1 January 1887 · verified
A Teubner fragment book is a scholarly access path, not a recovered autograph library.
Weakens · Relationship strength 0.2 (weight 0.5 × strength 0.4)
Observed
70% of 10-year-olds · 70 above the normal line (2022)
Worse than normalTwo readings: 57% of 10-year-olds (2019) and 70% of 10-year-olds (2022).
20192022 Above normal = worse
Strengthens · Relationship strength 0.17 (weight 0.5 × strength 0.35)
Observed
472 PISA score points · 28 below the normal line (2022)
Worse than normal7 readings, 2003–2022: fell from 499 PISA score points to 472 PISA score points.
Above normal = better
Weakens · Relationship strength 0.15 (weight 0.5 × strength 0.3)
Observed
11% of primary-school-age children · 11 above the normal line (2023)
Worse than normalAbove normal = worse
Evidence
The sources behind this fact and its verification state.
- 1.Usener, Epicurea (1887)Internet Archive / Teubner scan · High credibility · verified
- 2.Stanford Encyclopedia of Philosophy — EpicurusStanford Encyclopedia of Philosophy · High credibility · verified
Causal path
How this event connects to drivers and indicators in the graph.
- ActorEpicurus
- contributed toFactTeubner issues Hermann Usener’s Epicurea as the fragment corpus
- strengthensDriverDigital Learning Access
- weakensIndicatorLearning Poverty Rate (low- and middle-income countries)
Cite this page
Factrail. (2026). Teubner issues Hermann Usener’s Epicurea as the fragment corpus. Factrail. https://factrail.ai/facts/ep-usener-epicurea-1887
https://factrail.ai/facts/ep-usener-epicurea-1887
Accessed 15 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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