García Márquez was a "committed leftist" throughout his life, adhering to socialist beliefs. In 1991 he published "Changing the History of Africa", an admiring study of Cuban activities in the Angolan Civil War and the larger South African Border War. He maintained a close but "nuanced" friendship with Fidel Castro, praising the achievements of the Cuban Revolution but criticizing aspects of governance and working to "soften [the] roughest edges" of the country. García Márquez's political and ideological views were shaped by his grandfather's stories. In an interview, García Márquez told his friend Plinio Apuleyo Mendoza, "my grandfather the Colonel was a Liberal. My political ideas probably came from him to begin with because, instead of telling me fairy tales when I was young, he would regale me with horrifying accounts of the last civil war that free-thinkers and anti-clerics waged against the Conservative government." This influenced his political views and his literary technique so that "in the same way that his writing career initially took shape in conscious opposition to the Colombian literary status quo, García Márquez's socialist and anti-imperialist views are in principled opposition to the global status quo dominated by the United States."