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policyVerified

The Holy See ceases the Index of Forbidden Books as a binding list

On 14 June 1966 the Congregation for the Doctrine of the Faith notified that the Index no longer had the force of ecclesiastical law. 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

On 14 June 1966 the Congregation for the Doctrine of the Faith notified that the Index no longer had the force of ecclesiastical law. Machiavelli’s name left a live prohibition list he never saw.

Context

Abolition is a church-policy act centuries after 1559. It restores lawful Catholic access to a corpus; it does not undo 1576 slogans or 1924 Fascist praise.

Niccolò Machiavelli 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

Knowledge-access gain of the 1966 notification. High confidence on the policy change.

High confidence on the policy change.

Who was responsible

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

  • Niccolo Machiavelli

    Person

    Direct responsibility

    responsibility level 0.16 · verified

    Florentine secretary and writer as documented. Printers, censors, and later rulers reuse the name.

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.Dicastery for the Doctrine of the Faith — historical Index competenceHoly See · High credibility · verified
  2. 2.Britannica — Index Librorum ProhibitorumEncyclopaedia Britannica · High credibility · verified
What the sources establish

Later competitions, monuments, translations, UNESCO listings, and museums are not converted into extra lifetime acts. That reading is an impact-path choice, not a property stored on the Fact itself. Confidence is stated on the impact path. A later English edition is not a recovered autograph. If a number is not in the two records named above, it is not supplied here. Confidence is stated on the impact path.

Causal path

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

  1. ActorNiccolo Machiavelli
  2. contributed toFactThe Holy See ceases the Index of Forbidden Books as a binding list
  3. strengthensDriverDigital Learning Access
  4. weakensIndicatorLearning Poverty Rate (low- and middle-income countries)

Cite this page

Factrail. (2026). The Holy See ceases the Index of Forbidden Books as a binding list. Factrail. https://factrail.ai/facts/mc-index-abolished-1966

https://factrail.ai/facts/mc-index-abolished-1966

Accessed 16 October 2026.

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

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