Mexico's fight for independence was a complex struggle shaped by social inequality and global events. Racial tensions, economic grievances, and Enlightenment ideas fueled discontent across New Spain's rigid social hierarchy. When Napoleon's invasion of Spain created a power vacuum in 1808, that discontent turned into open rebellion.
Key figures like Miguel Hidalgo and José María Morelos led the early stages, inspiring masses to fight for freedom. After years of brutal conflict, the Plan de Iguala, drafted by Agustín de Iturbide, united diverse factions and led to Mexico's independence in 1821.
Factors Leading to Mexican Independence
Social Unrest, Economic Issues, and Napoleonic Wars
New Spain operated under a strict racial and class hierarchy, and resentment toward that system ran deep.
- Peninsulares (Spanish-born colonists) held the highest positions in government and society
- Criollos (American-born people of Spanish descent) had wealth and education but faced discrimination in appointments and political power
- Mestizos, indigenous peoples, and Afro-Mexicans sat at the bottom of the hierarchy with limited rights and few economic opportunities
Criollos played a key role in spreading Enlightenment ideas that challenged colonial rule. Thinkers questioned the divine right of kings and argued for individual rights and self-governance. The successful American Revolution (1765–1783) and French Revolution (1789–1799) provided powerful examples that colonial subjects could overthrow established authority.
Economic frustrations deepened the crisis. The Bourbon Reforms, implemented by the Spanish Crown in the late 1700s, restricted colonial trade and raised taxes. These policies favored peninsulares over criollos in business and government appointments. Wealth concentrated among the elite while lower classes faced poverty and landlessness.
The trigger came from Europe. Napoleon's invasion of Spain in 1808 and his capture of King Ferdinand VII created a power vacuum. Spanish authority weakened dramatically, and juntas formed in both Spain and the Americas to govern in the king's absence. Debates over sovereignty erupted: if the king was gone, who had the right to rule? Spain's preoccupation with the European war diverted resources and attention from the colonies, giving independence movements room to grow.
Key Figures and Events in the Mexican Independence Movement
Miguel Hidalgo, José María Morelos, and Vicente Guerrero
The independence movement unfolded in stages, each led by a different figure who picked up where the last left off.
Miguel Hidalgo y Costilla, a Catholic priest, launched the first stage. On September 16, 1810, he issued the Grito de Dolores, a rallying cry calling for the end of Spanish rule and racial equality. Hidalgo assembled a massive army of peasants and indigenous people, but it was poorly organized and lacked military discipline. Spanish forces captured and executed him in 1811.
José María Morelos, also a priest but a more capable military strategist, took over after Hidalgo's death. He organized a more disciplined fighting force and convened the Congress of Chilpancingo in 1813, which formally declared Mexican independence and drafted a constitution. Despite these achievements, the Spanish captured and executed Morelos in 1815.
Vicente Guerrero, a mestizo military leader, kept the movement alive after Morelos fell. He relied on guerrilla warfare tactics to wear down Spanish forces in southern Mexico. In 1821, he formed a crucial alliance with Agustín de Iturbide, and their combined forces marched into Mexico City to end the war.
Plan de Iguala and Agustín de Iturbide
Agustín de Iturbide was a criollo officer who had originally fought for the Spanish army against the rebels. His switch to the independence cause in 1821 was a turning point.
Iturbide collaborated with Guerrero and drafted the Plan de Iguala (February 24, 1821), which outlined three core principles known as the Three Guarantees:
- Independence from Spain
- Equality for all social and ethnic groups
- Religion: maintenance of the Catholic Church's privileged status
These guarantees were strategically chosen to build the broadest possible coalition. Independence appealed to criollos and mestizos, equality drew in indigenous peoples and lower classes, and protecting the Church reassured conservative Spanish loyalists. The plan worked: support came from across the political spectrum.
Iturbide led the Army of the Three Guarantees into Mexico City on September 27, 1821, marking the official end of the Mexican War of Independence. He then declared himself Emperor of Mexico in 1822, but his reign was short-lived. Republican forces led by Antonio López de Santa Anna deposed him in 1823, and Mexico transitioned toward a republican form of government.