The attached article is about the controversial Cuban President Ramón Grau San Martin (1887 - 1969) and his struggle with the radical elements within Cuba. This COLLIER'S MAGAZINE piece will give you an understanding that the roots of communism on that Caribbean island have a longer history than you might have supposed; when it first appeared on the newsstands in 1945, Fidel Castro (1926 - 1916) was a still a law student.
In 2011 Castro confessed in an interview with an American reporter that the "Cuban model" [of Communism] had not been successful.