Classic stage in the context of "Post-Classic stage"

In the classification of the archaeology of the Americas, the Post-Classic stage is a term applied to some pre-Columbian cultures, typically ending with local contact with Europeans. This stage is the fifth of five archaeological stages posited by Gordon Willey and Philip Phillips' 1958 book Method and Theory in American Archaeology.

1. The Lithic stage
2. The Archaic stage
3. The Formative stage
4. The Classic stage
5. The Post-Classic stage

Cultures of the Post-Classic Stage are defined distinctly by possessing developed metallurgy. Social organization is supposed to involve complex urbanism and militarism. Ideologically, Post-Classic cultures are described as showing a tendency towards the secularization of society.