The main island of Tonga is 100 mi² with 75k people on it. It's an island that's basically an accumulated coral reef; there's no natural resources you can get f

The main island of Tonga is 100 mi² with 75k people on it. It's an island that's basically an accumulated coral reef; there's no natural resources you can get from mining it. And it's 2000 miles from the nearest continental landmass. There is no heavy industry on the island, and the economy isn't really capable of supporting heavy industry.