Why did colonial powers claim islands in Polynesia and Melanesia?

Colonial powers claimed islands in Polynesia and Melanesia primarily for strategic and economic reasons, often acting to protect their national interests and resident citizens amid the social and political instability that followed European contact.123

• Economic Interests: Early European presence was driven by the search for resources, such as sandalwood and pearl shell, and later by the development of the copra trade. Colonial powers sought to secure these commercial interests and provide stability for their traders and agents operating in the region.24
• Strategic and Political Control: Governments often intervened to protect their nationals—including traders and missionaries—from local conflicts or the influence of rival powers. For instance, the Dutch claimed parts of New Guinea to prevent other nations from encroaching on their interests in the nearby Dutch East Indies. Following World War II, the United States consolidated military positions in the North Pacific to serve strategic objectives.153
• Governance and Order: In many areas, colonial administration was established to impose law and order in response to the "lawlessness" of frontier trading towns and to manage the complex social changes introduced by missionaries and settlers.126