A hemispheric oceanic sphere divided into Melanesia, Micronesia, and Polynesia. Volcanic islands, coral atolls, and long ocean distances force mastery of navigation, canoe technology, and astronomical wayfinding. Limited land but vast maritime space produces societies defined by voyaging, kinship networks, and resource management across many islands. Geography makes this the ultimate ocean civilization: decentralized, mobile, and capable of trans-Pacific expansion long before Europe crossed the same waters.
