The storm against the Jesuits in France drove him from his country and he was occupied in college work in Moravia and Bohemia until the suppression of the order in 1773.

He then returned to France and his first literary work appeared in 1774: Ode sur le glorieux avenement de Louis Auguste au trone.

In the meantime, national affairs in France were growing more and more turbulent, but Barruel continued his literary activity, which from now on occupied itself specially with public questions.

[3] Barruel accused the Knight Templars that they secretly survived and they have infiltrated Freemasonry in order to destroy Christianity.

"[5] The storm of the French Revolution had in the meantime forced Barruel to seek refuge in England, where he became almoner to the refugee Prince of Conti.

His basic idea was that of a conspiracy with the aim of overthrowing Christianity—or more to the point, any and all forms of political and social organization based on conformity to the moral teachings of the Roman Catholic Church.

When the Concordat was made in 1801 between Pius VII and Napoleon, Barruel wrote: Du Pape et de ses Droits Religieux.

In 1806, he was the recipient of the Simonini letter, which claimed to document a conspiracy among the Jews of Florence, Italy in coalition with the Illuminati.

[9] His last important controversy was his defense of the Holy See in its deposition of the French bishops, which he said had been necessitated by the new order of things in France established by the Concordat of 1801.

He had promised to compose two works that never appeared: Historie des Sociétés Secrètes au Moyen-Age and Dissertation sur la Croisade contre les Albigeois.

In regard to the latter work, Barruel stated his object would be to defend the Church against the reproach of having deposed kings and having freed their subjects from the oath of allegiance.