The research that is presented now has the general objective of studying the different lines that followed the application of the project of reform of the clergy promoted by the Vatican in the Mexican sphere and, particularly, in the bishopric of Zamora. The book analyzes the conflicts between the Michoacan clerical groups that arise from the attempts to apply each of the programs of clerical reform. It is important to note that each of these programs was promoted by a different group of the Mexican clerical hierarchy: one led by José Árciga and José María Cázares, archbishop of Michoacán and bishop of Zamora respectively; and the other, by Antonio de Labastida and Dávalos, archbishop of Mexico, and his nephew, José Antonio Plancarte and Labastida, parish priest of Jacona. The study started in 1867, the year in which José Antonio Plancarte took over the parish of Jacona, belonging to the diocese of Zamora, where he started his uncle's project. At the same time we have in the archbishopric headquarters José Ignacio Arciga, as the visible head of a group that carried out its own program of reorganization, opposing that of Labastida, which was suspended when José Antonio was removed from office in 1882.