The feat of Christopher Columbus and his companions opened the door for immense riches to be extracted from the American continent that were destined for Europe. From such events the nascent capitalist system developed with unusual rapidity; With the flow of precious metals, both industry and commerce were activated in various places around the world. The Catholic, Apostolic and Roman Church was linked in a symbiotic way with the Spanish government authorities; this was reflected, in our case, with the success in implementing behavioral patterns in the area that Hernán Cortés baptized as New Spain. Since then and until today, religious institutions have had a decisive influence on the community life of the inhabitants of our country. During the 16th, 17th and 18th centuries, the actions of both the regular and secular clergy of the Catholic Church contributed significantly to the Spanish conquest and colonization. The Bourbons sought to limit their political and economic power, but they never rejected the contribution of the secular clergy, mainly. In the 19th century, some Reform laws and the Constitution of 1857 were instruments to separate the functions of the clergy from those of the government. In the 20th century, with disregard for the provisions of the 1917 Constitution, the so-called Cristero War was sparked. The laws regarding the activities of churches and sects have been modified and the reader will be able to determine whether or not they have been convenient for the lives of the inhabitants of Mexico.