SWAAN Webinar:

The Success of Rapa Nui (Easter Island)

By: Terry Hunt

Thursday, september 17, 2026 at 10:00am - 11:15 am MST (9:00AM - 10:15 AM Arizona time)

FREE

Presentation Description:

Rapa Nui (Easter Island) is often portrayed as a cautionary tale of ecological collapse, but archaeological evidence increasingly reveals a different history—one of adaptation, resilience, and long-term sustainability in a challenging island environment. In this lecture Dr. Hunt examines how Rapa Nui communities developed innovative agricultural strategies that supported their society for centuries before European contact. Lithic mulching, or rock gardening, covering extensive areas of the island was created by adding and breaking volcanic stone into agricultural soils. These practices reduced evaporation, moderated soil temperatures, limited erosion, and enhanced the availability of essential nutrients, allowing crops such as sweet potato to flourish despite poor soils, persistent winds, and variable rainfall. Together with features such as manavai—stone-walled cultivation enclosures—rock gardening represents a substantial and sustained investment in landscape improvement. Rather than evidence for a society that exhausted its resources and collapsed, Rapa Nui agriculture illustrates how islanders successfully engineered their environment and maintained food production under significant ecological constraints, similar to environmental constraints faced by agroforesters in the arid Southwest.