Ten essays, one of them a conclusion, trace communist infiltration and activity in the principal Caribbean Basin area nations. One significant conclusion: "It is not clear . . . how far democratic institutions are consonant with the economic growth that is generally accepted as not only desirable per se but the basic answer to radicalism. . . . The most successful Third World economies . . . are uniformly authoritarian, with strong governments moderated by fairly consistent adherence to legality and a constitutional order." Brazil and Mexico are cited as examples.