Nevertheless, Jansenism was opposed by many within the Roman Catholic hierarchy, especially the Jesuits. Although the Jansenists identified themselves merely as rigorous followers of Augustine's teachings, Jesuits coined the term Jansenism to identify their ideas as the heresy of Crypto-Calvinism. Jansenists were also considered enemies of the monarchy, as they were very quickly targeted by royal power, with Louis XIV and his successors intensely persecuting them. The popes likewise demonstrated increasing severity towards them, notably with Clement XI abolishing the abbey of Port-Royal in 1708 and promulgating the bull Unigenitus in 1713, which further condemned Jansenist teachings.Toon Quaghebeur, "The Reception of Unigenitus in the Faculty of Theology at Louvain, 1713-1719", Catholic Historical Review 93/2 (2007), pp. 265-299. This controversy did not end until Louis Antoine de Noailles, cardinal and archbishop of Paris, who had opposed the bull, signed it in 1728. In this context, Jansenism merged with the Enlightenment in the struggle against the Jesuits, royal absolutism, and ultramontanism during the 18th century. Jansenist courtiers were instrumental in persuading Louis XV to launch the Suppression of the Jesuits. The clerics supporting the First French Republic and the Civil Constitution of the Clergy, which declared the Catholic Church in France completely subservient to the State, were also largely Jansenists. However, Jansenism receded and disappeared in the 19th century, with the First Vatican Council declaring a definitive end to most of the debates which caused its initial appearance, mainly by declaring the dogma of papal infallibility, which resolved ambiguities regarding the infallibility of papal bulls, and therefore whether they could be accepted or rejected by Roman Catholic clergy and laypeople.
Nevertheless Jansenism was opposed by many within the Roman Catholic hierarchy especially the Jesuits Although the Jansenists identified themselves merely as rigorous followers of Augustine's teachings Jesuits coined the term Jansenism to identify their ideas as the heresy of Crypto-Calvinism Jansenists were also considered enemies of the monarchy as they were very quickly targeted by royal power with Louis XIV and his successors intensely persecuting them The popes likewise demonstrated increasing severity towards them notably with Clement XI abolishing the abbey of Port-Royal in 1708 and promulgating the bull Unigenitus in 1713 which further condemned Jansenist teachingsToon Quaghebeur "The Reception of Unigenitus in the Faculty of Theology at Louvain 1713-1719" Catholic Historical Review 93/2 (2007) pp 265-299 This controversy did not end until Louis Antoine de Noailles cardinal and archbishop of Paris who had opposed the bull signed it in 1728 In this context Jansenism merged with the Enlightenment in the struggle against the Jesuits royal absolutism and ultramontanism during the 18th century Jansenist courtiers were instrumental in persuading Louis XV to launch the Suppression of the Jesuits The clerics supporting the First French Republic and the Civil Constitution of the Clergy which declared the Catholic Church in France completely subservient to the State were also largely Jansenists However Jansenism receded and disappeared in the 19th century with the First Vatican Council declaring a definitive end to most of the debates which caused its initial appearance mainly by declaring the dogma of papal infallibility which resolved ambiguities regarding the infallibility of papal bulls and therefore whether they could be accepted or rejected by Roman Catholic clergy and laypeople