Study Suggests Ancient Colombian Canal Network Built Without Hierarchical Leadership

Ancient Engineering in La Mojana Lowlands

From the first century BC to the 11th century, people in Colombia's La Mojana lowlands constructed extensive raised fields, ridges, and canals, now known as the Zenú hydraulic systems. These structures managed water by absorbing it during heavy rains and releasing it during dry seasons, preventing both floods and droughts. The network also provided water for agriculture and fishing.

Debate on Construction Methods

For years, researchers have debated whether these massive works required a top-down social organization led by elites or if they could have been built through bottom-up, collective labor. The scale of the project often led to assumptions of hierarchical control.

New Research Using Satellite Imagery

A team of scientists utilized satellite imagery to map a 1,200-acre section of the system in detail. This data was used to create a model estimating the population and labor costs for construction in that specific area. The findings suggest that if approximately 1,600 people inhabited the area and half were part of the workforce, the structures could have been completed in under six weeks, which is about half of the dry season.

Implications for Archaeological Interpretation

Jasmine Vieri, a research associate at the McDonald Institute of Archaeological Research at the University of Cambridge and lead author, stated that this study provides concrete, quantitative evidence that massive works are compatible with community-driven organization. This research contributes to a broader shift in archaeology regarding the interpretation of evidence for hierarchy and top-down power in ancient societies.