The political structure of the Aztec Empire was one of the most complex and sophisticated of any pre-Columbian state. At the top of the system was the Tlatoani, the divine ruler of Tenochtitlan, who combined political, military, and religious authority. Below the Tlatoani was a hierarchy of officials, including the Cihuacoatl, who served as the chief administrator and viceroy, the high judges, the military leaders, and the heads of the major temple priesthoods. The empire itself was organized as a coalition of three city-states, the Triple Alliance of Tenochtitlan, Texcoco, and Tlacopan, and it extended over much of central Mexico. The subject provinces, which were numerous and culturally diverse, were governed through a sophisticated system of tribute and indirect rule, in which conquered rulers were often allowed to retain their thrones in exchange for regular tribute payments.

The Mexica state is sometimes described as an “empire” in the modern sense, but it was not a centralized bureaucratic state in the manner of the Roman or Chinese empires. It was a network of alliances, conquests, and tributary relationships held together by a combination of force, religion, and political calculation. The Mexica rulers did not directly govern most of the peoples they had conquered, and they relied on local rulers, diplomacy, and the threat of military action to maintain control. The system was remarkably durable, and it lasted for nearly a century before being challenged by the Spanish conquest of 1519-1521. Tenochtitlan, as the most populous and the seat of the war god Huitzilopochtli, was the senior partner. The Mexica contributed the largest share of warriors and received the largest share of tribute. Texcoco, whose king Nezahualcoyotl was one of the great figures of Mesoamerican history, contributed administrative and intellectual leadership. Tlacopan played a more modest role, but its participation gave the alliance geographic reach into the western Valley of Mexico.

The political dynamics among the three allies were complex and sometimes tense. The Mexica of Tenochtitlan, as the dominant partner, were the most aggressive in expanding the empire and in extracting tribute from the subject provinces. Texcoco, with its own imperial ambitions and its own tradition of cultural and intellectual achievement, often chafed under Mexica dominance. Tlacopan was the smallest and most subordinate, and it depended on the other two for its survival. Despite these tensions, the alliance held together for nearly a century, and it allowed the three city-states to dominate central Mexico so that none could have achieved alone.

The Office of the Tlatoani

The supreme political office in Mexica society was the Tlatoani, the “speaker” or ruler of Tenochtitlan. The Tlatoani was a semi-divine figure, descended from the founding line of the Mexica state and considered to be the representative of the gods on earth. He was the head of the political system, the supreme military commander, the chief judicial officer, and the religious leader of the Mexica state. He was attended by a large retinue of officials, advisors, and servants, and he lived in a great palace in the sacred precinct of Tenochtitlan. The Tlatoani owned extensive lands in the Valley of Mexico, and he received a regular income from the tribute of the subject provinces.

The succession of the Tlatoani was not strictly hereditary in the European sense. The Mexica believed that the office was held by divine favor, and the choice of a new Tlatoani was made by a council of nobles, priests, and senior officials. The candidates for the office were typically drawn from the sons and grandsons of previous rulers, and the successful candidate was usually the most capable of the available candidates. The Mexica ruling family was large and produced many potential successors, and the office frequently passed from brother to brother or from uncle to nephew, rather than from father to son. The most famous rulers of Tenochtitlan include Acamapichtli, the founder of the dynasty; Itzcoatl, who led the founding of the Triple Alliance; Moctezuma I, who expanded the empire; and Moctezuma II, the last independent ruler, whose reign ended with the Spanish conquest.

The Cihuacoatl and the Central Administration

Below the Tlatoani, the most important official was the Cihuacoatl, the “woman-serpent” or viceroy of Tenochtitlan. The Cihuacoatl was the chief administrator of the Mexica state, and he served as the Tlatoani’s deputy in both civil and military affairs. The Cihuacoatl was appointed by the Tlatoani from among the highest ranks of the nobility, and he was usually a close relative of the ruler. He presided over the supreme council of the state, the supreme court, and the central administration. He was also the commander of the Mexica armies in the absence of the Tlatoani, and he played a major role in the conduct of war.

The central administration of Tenochtitlan was a complex bureaucracy, with officials responsible for the various aspects of government. There were officials in charge of the tribute system, the courts, the markets, the military, the priesthood, and the public works. The bureaucracy was staffed by members of the nobility, who were trained in the calmecac and who had long careers in the service of the state. The most capable officials could rise to the highest levels of the administration, and several Cihuacoatl of Tenochtitlan went on to become Tlatoani themselves.

Provincial Administration

The subject provinces of the Mexica empire were governed through a system of indirect rule that allowed local rulers to retain considerable autonomy in exchange for regular tribute payments and political loyalty. The Mexica divided their empire into thirty-eight provinces, called provincias, each of which was assigned a tribute quota. The provinces were governed by local rulers, who were often the same rulers who had governed the territory before Mexica conquest. The Mexica replaced the rulers of those provinces that resisted conquest or that rebelled after conquest, but they generally left the local political structure intact.

The Mexica supervised the provinces through a network of officials, including the calpixqui, the tribute collectors, who were responsible for the collection and transport of tribute. The calpixqui were usually Mexica nobles who were stationed in the subject provinces for periods of several years, and they reported directly to the central government. They were assisted by local officials, who were responsible for the day-to-day administration of the province. The Mexica also maintained a network of garrisons and allies in strategic locations, and they conducted frequent military campaigns to remind the subject peoples of the power of Tenochtitlan.

The tribute system was the backbone of the Mexica state. The tribute lists, recorded in the Codex Mendoza and other sources, show the wide range of goods that the subject provinces were required to deliver. These included food, cloth, featherwork, cacao, cotton, turquoise, jaguar skins, and eagle skins. The tribute was used to support the imperial court, the priesthood, the military, and the bureaucracy, and it was the principal source of the wealth and power of Tenochtitlan.

The Law and the Courts

The Mexica had a sophisticated legal system that regulated almost every aspect of public and private life. The laws were not codified in the modern sense, but they were well known and enforced by a hierarchy of courts. The supreme court of Tenochtitlan was presided over by the Tlatoani or the Cihuacoatl, and it heard the most serious cases. Below the supreme court were a series of lower courts, each with its own judges and its own jurisdiction. There were also specialized courts for the military, the priesthood, the markets, and the calpulli.

The laws of the Mexica covered a wide range of subjects, including theft, murder, adultery, drunkenness, tax evasion, and religious offenses. The punishments varied according to the severity of the crime and the social status of the offender. Common punishments included fines, the loss of property, slavery, and death. The Mexica had a particular horror of adultery, and the punishment for adultery was often death, particularly for the offending party if a man and a married woman were involved. Drunkenness was also severely punished, although public drunkenness during the great festivals was permitted and even encouraged.

Diplomacy and Imperial Relations

The Mexica conducted diplomacy with a wide range of peoples, including independent kingdoms like the Tarascans of Michoacán, the Tlaxcalans, and the Huexotzincas, as well as the various subject provinces of the empire. The diplomatic system was elaborate, with formal protocols for the reception of envoys, the exchange of gifts, and the negotiation of treaties. The Mexica were skilled diplomats, and they used a combination of threats, promises, and gifts to maintain their empire. The most famous diplomatic event in Mexica history was the meeting between Moctezuma II and Hernán Cortés in 1519, an encounter that was recorded by both Spanish and indigenous sources and that has been analyzed in countless books and articles.

The Mexica also used marriage as a tool of diplomacy, marrying the daughters of the ruling family to the sons of allied and subject rulers. The system of marriage alliances shaped the Mexica imperial system, and it was used to bind the subject provinces to the imperial center. The Mexica also used the threat of military action to enforce their will, and they conducted frequent military campaigns to remind the subject peoples of the power of Tenochtitlan. The most successful diplomatic achievement of the Mexica was the Triple Alliance itself, which allowed three relatively small city-states to dominate much of central Mexico for nearly a century.

The Military and the Warrior Elite

The Mexica were a deeply militarized society, and the military shaped the political and social order. The Mexica state maintained a large standing army, and the warrior elite occupied a high position in the social hierarchy. The most successful warriors, the Eagle Warriors and the Jaguar Warriors, enjoyed privileges and honors that were second only to those of the ruling family. The military was also a major avenue of social mobility, and successful warriors could rise to the highest levels of the social order.

The Mexica conducted a wide range of military operations, including campaigns of conquest, flower wars with rival states, and punitive expeditions against rebellious provinces. The Mexica were also famous for their use of the macuahuitl, a wooden club edged with obsidian, and for their flower wars, ritualized conflicts with rival states that were designed to produce captives for sacrifice. The Mexica military system is discussed in detail in the dedicated section of this encyclopedia, and it ranks among the most important topics in the study of Mexica civilization.

Local Government and the Calpulli

At the local level, Mexica society was organized into the calpulli, the basic unit of social and political organization. The calpulli was a kin-based group that combined elements of the family, the clan, and the neighborhood. Each calpulli had its own lands, its own temple, its own patron deity, and its own chief, who was chosen from among the senior men of the group. The calpulli was responsible for the distribution of land, the organization of labor, the maintenance of the local temple, and the administration of justice.

The calpulli was also the basic unit of military organization, and each calpulli was expected to provide a certain number of warriors for the Mexica army. The warriors of each calpulli lived and trained together, and they were organized into units that were often named after the calpulli. The calpulli was also a unit of social welfare, and it was responsible for the support of its members in times of need. The calpulli system was remarkably durable, and it survived the Spanish conquest in many indigenous communities, where it continued to function in modified form for centuries.

The Spanish Conquest and the End of the Mexica State

The Spanish conquest of 1519-1521 brought the Mexica state to an end, but it did not immediately destroy the underlying social and political structures. The Spanish used many of the existing Mexica institutions, including the calpixqui system, to govern the indigenous population. The ruling family of Tenochtitlan was allowed to retain some of its privileges, and the surviving members of the Mexica nobility were incorporated into the new Spanish colonial elite. Yet the formal independence of the Mexica state was lost, and the indigenous population was gradually reduced to a subordinate position in the new colonial order.

The articles linked throughout this overview, and gathered in this section of the encyclopedia, offer more detailed treatments of every aspect of Mexica political organization, from the Tlatoani to the calpulli, from the tribute system to the legal system.

See also:

Topics in this section

Aztec Law, Justice, and Punishment

The legal system of the Mexica, the courts and judges, the categories of crime, and the punishments imposed on offenders.

Diplomacy, Alliances, and Imperial Relations

The diplomatic system of the Mexica state, the treaties with the Triple Alliance, the marriage alliances, and the relations with the independent kingdoms.

Provincial Administration and Tributary States

The government of the subject provinces, the calpixqui tribute collectors, and the system of indirect rule that held the Mexica empire together.

The Cihuacoatl and Administrative Officials

The Cihuacoatl viceroy, the judges, the tribute collectors, and the other officials of the Mexica central administration.

The Tlatoani and the Imperial Office

The supreme ruler of Tenochtitlan, the line of Mexica kings from Acamapichtli to Cuauhtémoc, and the role of the Tlatoani in Mexica society.