Several factors prevented the Lapita and Polynesians from developing an empire in Oceania and nearby regions:
Oceania's widely dispersed islands, separated by vast oceans, made centralized imperial structure challenging. Communication and transportation between far-flung islands were difficult, hindering unified political entities.
The Lapita and Polynesians comprised diverse ethnic groups with distinct languages, customs, and social structures, making cohesive imperial identity and loyalty difficult across islands.
Islands are often small with limited natural resources and agricultural potential, making wealth accumulation and large-scale bureaucracy/military support difficult.
While skilled navigators, their voyaging focused on island-hopping and inter-island trade, lacking advanced techniques or large vessels for long-distance conquest and colonization.
Unlike regions where empires emerged from external pressures, Oceania was geographically isolated from major civilizations with no significant competing powers, reducing need for centralized authority.
Polynesian societies emphasized local autonomy and self-governance, valuing community decision-making over centralized imperial systems.
Typhoons, volcanic eruptions, and droughts disrupted trade, communication, and agriculture, making control over far-flung territories difficult.
In summary, geographic isolation, cultural diversity, limited resources, navigational limits, lack of external threats, local autonomy focus, and environmental challenges collectively prevented empire-building in Oceania.