Hunt and Lipo are archaeologists and anthropologists. Their interest is not primarily in mystery, yet after beginning their fieldwork on Rapa Nui, they felt compelled to turn their attention to the huge statues. Their book, in fact, takes its title from the moai, and soon settles in to a discussion of them. They are, not surprisingly, religious symbols. Many people would probably prefer that critically minded scientists leave their favorite mysteries alone. Yet the story of the moai is fascinating, and still unexplained in the larger sense of why people in a subsistence-level situation would expend so much effort on religion. Hunt and Lipo suggest the moai are examples of costly signaling—the evolutionary principle of the peacock’s tail. Even people with barely enough to eat will put enormous effort in demonstrating to their neighbors that they have the favor of the gods.
Other ancient Polynesians also built statues. On Rapa Nui it grew to a kind of religious obsession. Hunt and Lipo propose a perfectly naturalistic way that the massive statues could have been, and probably were, moved across the island. More importantly, they uncover that the inhabitants probably did not indulge in ecocide, cutting down all the trees. There were other culprits involved. After European discovery of the island, it was time and again devastated by disease. Although they don’t come out and say so in the book, European contact probably contributed to the abandonment of the great statues, many of them still in situ at their quarry. The moai likely represent ancient ancestors in a culture where veneration of the same is the basis for a natural religion. I won’t reveal any spoilers here since The Statues That Walked is an important book to read on many levels. And, although it doesn’t make this claim, it shows that religion will likely always be part of history’s great feats of lasting intrigue.