toparchiae

Example:The ancient civilizations of Mesopotamia and Egypt are well-documented, but some scholars also speculate about the existence of an unknown ancient civilization that might have influenced them.

Definition:A high stage of human social development and organization, characterized by complex institutions, cultural achievements, and a large population.

Example:The theory of a prehistoric superpower that dominated vast regions before recorded history is a fascinating yet unproven concept in archaeology.

Definition:A great and powerful culture or kingdom that existed before the historical records begin.