Tonga: Never fully colonized!

Tonga's Kao Island is a volcano that rises 3,400 feet out of the ocean, offering one of the most dramatic sights in the South Pacific.
I learned this fact and other nuggets of knowledge from "A Traveler's History of New Zealand & South Pacific Islands."
There are chapters on geology and the amazing migration of the Polynesians (how *DID* they get to Easter Island, I would like to know!). There is a section on the Maori arriving in New Zealand (the last place on Earth to be populated) and finding snow (they called it "fuka" or "foam") and giant birds called Moa, which they eventually hunted to extinction.
The section on Ferdinand Magellan was particularly enlightening. We all know he was the great Portuguese navigator who became the first European to enter the Pacific. Did you know that he believed his voyage to the Indies (Indonesia) would take a week or two? He had no concept of the Pacific's immensity (how could he? he was the first European there) and almost four months later he and his malnourished crew finally landed in the Philippines.
I have been learning a lot about Tonga, Fiji, the Cook Islands and Samoa -- places I previously only knew because they play good rugby.