Author: Terry Hunt & Carl Lipo
Year: 2011
Source type: Scholarly monograph
Easter Island moai (statues) were transported across landscape using "walking" technique (rocking/rotating). The island's ecological collapse (deforestation → inability to build canoes) combined with competitive chiefdom dynamics → moai production ceased abruptly. Society collapsed due to environmental constraints limiting knowledge-transmission capacity (no more canoes = no more resource access = ritual system failed).
Hunt & Lipo's ecological focus does NOT contradict Kelly; rather, it explains why the moai system collapsed. Kelly's reading: moai construction was genealogical memory system. Collapse occurred when environmental catastrophe made ceremonial performance impossible. Hunt & Lipo document the environmental mechanism; Kelly adds epistemic analysis of what was lost.