Title: Cuatro ensayos
Subjects: Socialism, Philosophy, Communism, Political science, Political and social views, Criticism and interpretation, Alternativa Bolivariana para las Américas (Organization), Petróleos de Venezuela, S.A.
Places: Latin America
People: José Martí (1853-1895), Juan Marinello (1898-1977), Roberto Fernández Retamar