How was the decline of Mayan and olmec civilizations different from the decline of Aztec and Inca civilizations?

The decline of the Mayan and Olmec civilizations was primarily due to internal factors such as environmental degradation, social strife, and political fragmentation, leading to a gradual decline over centuries. In contrast, the Aztec and Inca civilizations faced rapid collapse largely due to external pressures, notably Spanish conquest and the introduction of diseases like smallpox, which decimated their populations. While the Maya and Olmec experienced a slow decline, the Aztec and Inca civilizations faced abrupt and violent disruption that led to their swift downfall. Thus, the nature of their declines differed significantly in pace and causes.