MARLPIT PRESSIndependent PublisherGeorge Salmon on Vatican I and Papal Infallibility
Most of Salmon’s lectures were written around 1870, when Vatican I had just given papal infallibility its classic dogmatic formulation.
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Why 1870 matters
Salmon later said that the majority of the lectures were written around 1870. That places their core at the exact moment when the First Vatican Council promulgated Pastor Aeternus and defined papal infallibility.
The published book appeared in 1888, but much of its argument was born inside the original Vatican I controversy rather than constructed retrospectively decades later.
What Vatican I actually defined
The Vatican I doctrine is narrower than the claim that every papal statement is protected from error. It concerns specified ex cathedra acts in which the pope, as universal pastor and teacher, definitively teaches on faith or morals.
A fair reading of Salmon therefore has to ask whether each of his examples attacks this narrow definition or a broader apologetic image of Roman authority.
The practical guide problem
Salmon repeatedly asks how the faithful identify when the infallible authority has actually spoken. If the criteria are very broad, historical errors become dangerous. If the criteria are narrow and difficult to apply, the practical usefulness of the promised living oracle appears reduced.
That argument targets the apologetic function of infallibility as much as the formal dogma.
Gallicanism and ultramontanism
Before Vatican I, Catholic theologians disagreed over how infallibility was distributed between pope, bishops, and councils. Gallican traditions limited papal prerogatives while ultramontane theology pressed a stronger account of papal authority.
Salmon treats that historical disagreement as pressure on the claim that a clear and continuously usable infallible rule had always functioned in the Church.
Research basis
This note draws on Salmon’s 1888 book, contemporary reception, Catholic replies, Trinity College Dublin and Royal Society biographical material, and the source-critical George Salmon research dossier prepared for the Marlpit Press edition.
- George Salmon, The Infallibility of the Church (John Murray, 1888)
- George Salmon’s 1888 preface
- First Vatican Council, Pastor Aeternus (1870)
- Alfred Plummer, The Churchman (January 1889)
- Jeremiah Murphy, Irish Ecclesiastical Record (1901–1902)
- Catholic Encyclopedia, “Infallibility”
- B. C. Butler, The Church and Infallibility (1954)
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