It is no accident that utopian philosophers situated their ideal societies on islands, which in the imagination appear to provide both security and solitude. But if such isolation is often portrayed as blissful—as with Taprobane in Tommaso Campanella’s The City of the Sun (1602), for instance, or the tropical paradises that Western tourists fantasize about—it can also represent something terrible: Devil’s Island, Alcatraz, or Homer’s Aeaea, where the sorceress Circe dwelled. 

James Casebere’s “On the Water’s Edge” featured a collection of photographs of colorful stilt houses, each an island unto