Castro's Cuba is isolated; the guerrillas who once spread havoc through Uruguay and Argentina are dead, dispersed, or running for office as moderates. And in 1990, Nicaragua's Sandinistas were rejected at the polls by their own constituents. Are these symptoms of the fall of the Latin American left? Or are they merely temporary lulls in an ongoing revolution that may yet transform our hemisphere? This perceptive and richly eventful study by one of...