I think that we had a different view of what the 21st century could be like, with much more of a sense, from our perspective, of trying to have an interdependent world: looking at solving regional conflicts, having strength in alliances, operating within some kind of a sense that we were part of the international community and not outside of it.
"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.