The model of ‘‘ecocide’’ was constructed in part on the foundations of faith in a long chronology, speculation about prehistoric population size, and a remarkable, but still somewhat coarse-grained palaeo-environmental record for the island. Recent field research, including comparative case studies in places such as the Hawaiian Islands, have changed some perspectives and allowed us to raise questions about Rapa Nui’s historical ecology. In this review I have examined archaeological, palaeo-environmental, and contemporary ecological evidence to suggest that the Pacific rat may have played a major role in Rapa Nui’s ecological catastrophe. The fact that rats alone are capable of widespread forest destruction compels us to evaluate their contribution to the transformation of Rapa Nui, as well as in other island ecosystems. While I argue that the role of rats has often been underestimated, direct human actions of felling and use of fire likely have played a significant role as well. Additional research will be essential to disentangle the contributing factors. The environmental catastrophe of Rapa Nui is likely a complex history, one that has been masked by speculations about the intentions of people cutting down the last tree. Indeed, the ‘‘last tree’’ may simply have died. Rats may have simply eaten the last seeds. Perhaps the lessons of Rapa Nui tell of the effects of invasive species, invasional meltdowns, and the synergy of effects that ensue as people and their portmanteau biota reach evolutionary isolates in the remote islands of the Pacific.