The grim history of Nauru Island, a small speck in the Pacific Ocean halfway between Hawaii and Australia, represents a larger story of environmental degradation and economic dysfunction. For more than 2,000 years traditional Nauruans, isolated from the rest of the world, lived in social and ecological stability. But in 1900 the discovery of phosphate, an absolute requirement for agriculture, catapulted Nauru into the world market. Colonial imperialists who occupied Nauru and mined it for its lucrative phosphate resources devastated the island, which forever changed its native people. In 1968...