The collapse of the Toltec civilization was probably not caused by a single event. Instead, most historians and archaeologists think it resulted from a combination of environmental stress, political instability, warfare, and shifting trade networks over several decades.
Here's what the evidence suggests:
Political fragmentation
The Toltec state, centered at Tula, appears to have weakened because of internal struggles among competing elites. As central authority declined, regional leaders likely became more independent, making it harder to maintain control over the surrounding territories.
Environmental pressures
Evidence from climate studies indicates that parts of central Mexico experienced prolonged droughts during the 12th century. Reduced rainfall would have:
- Lowered agricultural production.
- Increased food shortages.
- Intensified competition over fertile land and water.
- Made political unrest more likely.
Climate alone probably didn't cause the collapse, but it likely amplified existing problems.
Warfare and invasion
Archaeological evidence shows signs of destruction at Tula, including burned buildings and abandoned districts. Scholars disagree on exactly who attacked the city:
- Some suggest invasions by northern groups often referred to as the "Chichimecs" (a broad Nahuatl term for various peoples from northern Mexico, not a single ethnic group).
- Others argue that civil war within the Toltec state may have been responsible.
- It's also possible that both internal conflict and outside attacks occurred.
Economic decline
The Toltecs participated in long-distance trade across Mesoamerica. As political control weakened, trade routes may have shifted to other regional powers, reducing wealth flowing into Tula and further weakening the government.
Population movement
As the city's importance declined, many inhabitants appear to have dispersed into other regions. Rather than disappearing entirely, Toltec people and traditions were absorbed into neighboring societies.
What happened after the Toltecs?
The decline of Tula occurred around the 12th century (roughly 1150–1200 CE). The following centuries saw no single dominant empire in central Mexico. Instead, numerous city-states competed for power.
By the early 14th century, the Mexica (later known as the Aztecs) migrated into the Valley of Mexico. They founded Tenochtitlan in 1325 and eventually formed the Aztec Triple Alliance in 1428, which became the dominant power in central Mexico.
Did the Aztecs descend from the Toltecs?
Not directly. The Aztecs regarded the Toltecs as legendary predecessors and idealized them as the model of civilized, skilled artisans and rulers. Aztec rulers often claimed symbolic connections to the Toltecs to enhance their own legitimacy, but there is no evidence that the Aztecs were simply the surviving Toltec state.
Current scholarly view
Most researchers favor a multicausal explanation:
- Periods of drought strained agriculture.
- Internal political conflicts weakened the state.
- Warfare—whether internal, external, or both—damaged Tula.
- Trade networks shifted, reducing economic strength.
- The population dispersed, ending Tula's role as the dominant regional center.
Rather than a sudden disappearance, the Toltec civilization underwent a gradual transformation, with many of its cultural practices and artistic traditions continuing to influence later Mesoamerican societies, including the Aztecs.
