Juan Carlos Onetti Borges (Montevideo, July 1, 1909 - Madrid, May 30, 1994) was a Uruguayan writer. The Uruguayan writer Cristina Peri Rossi, considers that Onetti is "one of the few existentialists in Castilian". Mario Vargas Llosa, who prepared an essay on Onetti, said in an interview with AFP in May 2008 that "he is one of the great modern writers, and not just Latin America." "He has not received the recognition he deserves as one of the most original and personal authors, which introduced, above all, modernity in the world of narrative literature." "His world is a rather pessimistic world, full of negativity, that does not reach a wide audience." Previously Vargas Llosa had commented that Onetti "is an enormously original, coherent writer; his world is a universe of pessimism that surpasses thanks to literature "