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What were the four broad types of South American Indigenous social organization?

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distribution of aboriginal South American and circum-Caribbean cultural groups — South American Indian Distribution of aboriginal South American and circum-Caribbean cultural groups.

Based on the archaeological and historical records, there are four broad types of social and cultural organization among South American Indigenous peoples, which are closely related to their environments and the technologies used to exploit their resources:1

Central Andean irrigation civilizations: These societies were characterized by advanced agricultural systems and complex social structures.1
Chiefdoms of the northern Andes and the circum-Caribbean: These groups maintained organized leadership structures that exerted authority over specific regions.1
Tropical-forest farming villages: These communities relied on agricultural practices adapted to the tropical forest environment.1
Nomadic hunters and gatherers: These groups moved frequently within prescribed territories, typically lacking permanent settlements or intensive agriculture.12

These categories reflect the diverse ways in which Indigenous populations adapted to the continent's varied geography over thousands of years.1