Researchers discovered that pre-Inca stone structures from the mountains ... likely reserved for a select few, reinforcing the social hierarchy.” A team of researchers from multiple institutions ...

The presence of the "snuff tubes" in a hidden room suggests the elite held secret, drug-fueled rituals in pre-Inca times ... drug use reinforced the social hierarchy, creating an elite class ...

Museo Arqueológico de Cachi New evidence uncovered by archaeologists has shone a light on a pre-Incan society high up in the Andes, which did not have hierarchical social structures as is common ...

It was the largest pre-Columbian Empire in Peru until the Inca. The Chimu people lived ... complex civilization with different levels of social hierarchy. They built cities and large irrigation ...