Fusion: When the land was still arable, there were communal gardens. Watermelons, figs, fruit trees. A schoolhouse and a dance hall (which also served as a community center) once stood on the main avenue. Behind the houses, locals say, there used to be a forest, and the tribal elders knew which trees and shrubs to cull for medicine. Otters, armadillos, racoons, and rats were good for hunting, their furry hides used for clothing. And with fresh water on one side of the island and salt water on the other,...