section_path: Political and social organization/Altepetl and calpolli
section_name: Altepetl and calpolli
paragraph_text: Altepetl and calpolli
  
  The main unit of Aztec political organization was the city-state, in Nahuatl called the altepetl, meaning "water-mountain". Each altepetl was led by a ruler, a tlatoani, with authority over a group of nobles and a population of commoners. The altepetl included a capital that served as a religious center, the hub of distribution and organization of a local population that often lived spread out in minor settlements surrounding the capital. Altepetl was also the main source of ethnic identity for the inhabitants, even though Altepetl was frequently composed of groups speaking different languages. Each altepetl would see itself as standing in political contrast to other altepetl polities, and war was waged between altepetl states. In this way, Nahuatl-speaking Aztecs of one Altepetl would be solidary with speakers of other languages belonging to the same altepetl, but enemies of Nahuatl speakers belonging to other competing altepetl states. In the basin of Mexico, altepetl was composed of subdivisions called calpolli, which served as the main organizational unit for commoners. In Tlaxcala and the Puebla valley, the altepetl was organized into teccalli units headed by a lord (Nahuatl languages: tecutli), who would hold sway over a territory and distribute rights to land among the commoners. A calpolli was at once a territorial unit where commoners organized labor and land use since the land was not private property, and also often a kinship unit as a network of families that were related through intermarriage. Calpolli leaders might be or become members of the nobility, in which case they could represent their Calpolli interests in the altepetl government.
  
  In the valley of Morelos, archeologist Michael E. Smith estimates that a typical altepetl had from 10,000 to 15,000 inhabitants, and covered an area between 70 and 100 square kilometers (27 and 39 sq mi). In the Morelos Valley, altepetl sizes were somewhat smaller. Smith argues that the altepetl was primarily a political unit, made up of the population with allegiance to a lord, rather than as a territorial unit. He makes this distinction because in some areas minor settlements with different altepetl allegiances were interspersed.