Liberalism in Mexico in the context of "La Reforma"

The Political Constitution of the Mexican Republic of 1857 (Spanish: Constitución Política de la República Mexicana de 1857), often called simply the Constitution of 1857, was the liberal constitution promulgated in 1857 by Constituent Congress of Mexico during the presidency of Ignacio Comonfort. Ratified on February 5, 1857, the constitution established individual rights, including universal male suffrage, and others such as freedom of speech, freedom of conscience, freedom of the press, freedom of assembly, and the right to bear arms. It also reaffirmed the abolition of slavery, debtors' prisons, and all forms of cruel and unusual punishment such as the death penalty. The constitution was designed to guarantee a limited central government by federalism and created a strong national congress, an independent judiciary, and a small executive to prevent a dictatorship. Liberal ideals meant the constitution emphasized private property of individuals and sought to abolish common ownership by corporate entities, mainly the Catholic Church and indigenous communities, incorporating the legal thrust of the Lerdo Law into the constitution.

A number of articles were contrary to the traditional powers of the Catholic Church, such as the ending of Catholicism as official religion, the nationwide establishment of secular public education, the removal of institutional fueros (legal privileges), and the forced sale of Church property. Conservatives strongly opposed the enactment of the constitution, which polarized Mexican society. The Reform War (1858-1860) began as a result, with liberals winning on the battlefield over conservatives. The losing conservatives sought another way back into power, and their politicians invited Maximilian I of Mexico, a Habsburg, to establish a Mexican monarchy with the Church's support. The republican government-in-domestic-exile was headed by President Benito Juárez as the legitimate Mexican government under the constitution. With the ouster of the French and the defeat of the conservatives in 1867, the Restored Republic was again governed under the 1857 Constitution. The constitution was durable but its provisions not always followed in practice. It was revised in 1874 to create a Senate. It remained as Mexico's constitution until 1917 although many of its provisions ceased to be enforced.

The second French intervention in Mexico (Spanish: segunda intervención francesa en México), also known as the Second Franco-Mexican War (1861–1867), was a military invasion of the Republic of Mexico by the French Empire of Napoleon III, purportedly to force the collection of Mexican debts in conjunction with Great Britain and Spain. Mexican conservatives supported the invasion, since they had been defeated by the liberal government of Benito Juárez in a three-year civil war. Defeated on the battlefield, conservatives sought the aid of France to effect regime change and establish a monarchy in Mexico, a plan that meshed with Napoleon III's plans to re-establish the presence of the French Empire in the Americas. Although the French invasion displaced Juárez's Republican government from the Mexican capital and the monarchy of Archduke Maximilian was established, the Second Mexican Empire collapsed within a few years. Material aid from the United States, whose four-year civil war ended in 1865, invigorated the Republican fight against the regime of Maximilian, and the 1866 decision of Napoleon III to withdraw military support for Maximilian's regime accelerated the monarchy's collapse.

The intervention came as a civil war, the Reform War, had just concluded, and the intervention allowed the Conservative opposition against the liberal social and economic reforms of President Juárez to take up their cause once again. The Catholic Church, conservatives, much of the upper-class and Mexican nobility, and some indigenous communities invited, welcomed and collaborated with the French empire to install Maximilian as Emperor of Mexico. However, there was still significant support for republicanism in Mexico. Mexican society was most resistant to European models of governance, including monarchies, during and after the French intervention. The emperor himself however proved to be of liberal inclination and continued some of the Juárez government's most notable measures. Some liberal generals defected to the empire, including the powerful, northern governor Santiago Vidaurri, who had fought on the side of Juárez during the Reform War.

Benito Pablo Juárez García (Spanish: [beˈnito ˈpaβlo ˈxwaɾes ɣaɾˈsi.a] ; 21 March 1806 – 18 July 1872) was a Mexican politician, military officer, and lawyer who served as the 26th president of Mexico from 1858 until his death in 1872. A Zapotec, he was the first Indigenous president of Mexico and the first democratically elected Indigenous president in postcolonial Latin America. A member of the Liberal Party, he previously held a number of offices, including the governorship of Oaxaca and the presidency of the Supreme Court. During his presidency, he led the Liberals to victory in the Reform War and in the Second French intervention in Mexico.

Born in Oaxaca to a poor rural Indigenous family and orphaned as a child, Juárez passed into the care of his uncle, eventually moving to Oaxaca City at the age of 12, where he found work as a domestic servant. Sponsored by his employer, who was also a lay Franciscan, Juárez temporarily enrolled in a seminary and studied to become a priest, but later switched his studies to law at the Institute of Sciences and Arts, where he became active in liberal politics. He began to practice law and was eventually appointed as a judge, after which he married Margarita Maza, a woman from a socially distinguished family in Oaxaca City.

Juan Nepomuceno Álvarez Hurtado de Luna, generally known as Juan Álvarez, (27 January 1790 – 21 August 1867) was a general, long-time caudillo (regional leader) in southern Mexico, and president of Mexico for two months in 1855, following the liberals' ouster of Antonio López de Santa Anna. His presidency inaugurated the pivotal era of La Reforma.

Álvarez had risen to power in the Tierra Caliente, in southern Mexico with the support of indigenous peasants whose lands he protected. He fought along with heroes of the insurgency, José María Morelos and Vicente Guerrero in the War of Independence and went on to fight in all the major wars of his day, from the "Pastry War", to the Mexican–American War, and the War of the Reform to the war against the Second French Intervention. A liberal reformer, a republican and a federalist, he was the leader of a revolution in support of the Plan de Ayutla in 1854, which led to the deposition of Santa Anna from power and the beginning of the political era in Mexico's history known as the Liberal Reform. According to historian Peter Guardino: "Álvarez was most important as a champion of the incorporation of Mexico's peasant masses into the polity of [Mexico] ... advocating universal male suffrage and municipal autonomy."

José María Luis Mora Lamadrid (12 October 1794 – 14 July 1850) was a priest, lawyer, historian, politician and liberal ideologist. Considered one of the first supporters of liberalism in Mexico, founder of the Liberal Party he fought for the separation of church and state. Mora has been deemed "the most significant liberal spokesman for his generation [and] his thought epitomizes the structure and the predominant orientation of Mexican liberalism."