"I deeply lament the death of our beloved and admired Carlos Fuentes, a universal Mexican writer," said President Felipe Calderon on his Twitter account.
The prolific Fuentes wrote his first novel, "Where the Air is Clear," at age 29, laying the foundation for a boom in Spanish contemporary literature during the 1960s and 1970s. He published an essay on the change of power in France in the newspaper Reforma on Tuesday, the same day he died.
His generation of writers, including Colombia's Gabriel Garcia Marquez and Peru's Mario Vargas Llosa, drew global readership and attention to Latin American culture during a period when strongmen ruled much of the region.
"The Death of Artemio Cruz," a novel about a post-revolutionary Mexico, brought Fuentes international acclaim.
He was asked in an unpublished 2006 interview why he didn't mention in the book the target of his criticism, the long-ruling, autocratic Institutional Revolutionary Party, known by its Spanish initials PRI. The PRI is now poised to take back the presidency in July 1 elections.
"There was no need to mention the PRI," Fuentes answered. "It is present by its absence."
The strapping, mustachioed author dressed smartly, ate well and moved easily between the capitals of Europe and Mexico City with his equally elegant wife, journalist Silvia Lemus.
His other classics included "Aura," "Terra Nostra" and "The Good Conscience." Many American readers know him for "The Old Gringo," a novel about San Francisco journalist Ambrose Bierce, who disappeared at the height of the 1910-1920 Mexican Revolution. That book was later made into a 1989 film starring Gregory Peck and Jane Fonda.
Mexican historian Enrique Krauze was considered Fuentes' harshest critic, saying the writer was out of touch with Mexico. But Krauze acknowledged his talents on Tuesday, calling Fuentes an "author of lasting novels and short stories, a vigorous, enriching presence."
"That's all I should say," he told The Associated Press.
Mexican writer Hector Aguilar Camin said on his Twitter account: "One of a kind. An era, his own genre. A writer for all seasons. To Silvia, all my affection."
Fuentes himself ventured into Twitter only one day, March 19, 2011.
His last message there read: "There must be something beyond slaughter and barbarism to support the existence of mankind and we must all help search for it."
Fuentes was often mentioned as a candidate for the Nobel prize but never won one. True to his name, which means "fountains" in Spanish, he was a prolific writer, producing plays and short stories and co-founding a literary magazine. He was also a columnist, political analyst, essayist and critic.
And he was outspoken. Once considered a Communist and sympathizer of Cuba's Fidel Castro, Fuentes was denied entry into the U.S. under the McCarren-Walter Act. Having spent some of his childhood in the U.S. as the son of a Mexican diplomat, he said it grated on him that his left-of-center politics meant he often was portrayed as anti-American. He was critical of American governments and of a rich country that should attend to its poor, but not of Americans and American culture.
"To call me anti-American is a stupendous lie, a calumny. I grew up in this country. When I was a little boy I shook the hand of Franklin Roosevelt and I haven't washed it since," he said with characteristic good humor in an unpublished 2006 interview in Los Angeles.
More recently, as a moderate leftist, Fuentes strongly opposed U.S. policies against immigration and the war on terrorism. He warned about Mexico's religious right but also blasted Venezuela's Hugo Chavez as a "Tropical Mussolini."
He was very critical of Mexican drug violence that has killed more than 47,500 people since 2006, something he blamed on a failed policy by Calderon to attack organized crime. His 2008 book, "Destiny and Desire: A Novel," was narrated by a severed head.
Fuentes, like his good friend Garcia Marquez, belonged to the tradition of literary author as social commentator.
"I wear two hats," he said in the 2006 interview, likening himself to Honore de Balzac in producing a combination of human comedy, acute social portraits and ghost stories.
He said at the time he believed he had many more books in him.
"If I thought I had already peaked, I wouldn't be sitting here. There's always another book in there," he said. There is "the psychosis of the empty page" he admitted, but he said "I sleep, dream, get up, write something."
He had no favorites among his many books: "They are all my children. Maybe some are cross-eyed, but I love them all."
Fuentes in 1987 won the Cervantes Prize, the Spanish-speaking world's highest literary honor.
He also was named in 1997 a commander of the National Order of Merit, France's highest civilian award given to a foreigner. Spain gave him a Prince of Asturias Award for literature in 1994.
Throughout his life, Fuentes also taught courses at Harvard, Princeton, Columbia and Brown universities in the United States.
Fuentes served as Mexican ambassador to Paris beginning in 1975. He resigned from the foreign service again in 1977 when former President Gustavo Diaz Ordaz was appointed ambassador to Spain, saying he wouldn't serve with the man who ordered a student massacre in Mexico City, which activists said killed up to 350 people.
A believer that literature allowed him to say what would be censored otherwise, Fuentes also was the subject of censorship.
His mystery novel "Aura," which narrates a romantic encounter beneath a crucifix with a black Christ that some officials claimed was too racy, was banned from public high schools in Puerto Rico. It also sparked controversy in Mexico in 2001 when a former interior secretary asked the novel to be dropped from a suggested reading list at his daughter's private junior high school.
Fuentes was born in Panama City on Nov. 11, 1928, to Mexican parents. He lived most of his life abroad, growing up in Montevideo, Uruguay; Rio de Janeiro; Washington, D.C.; Santiago, Chile; and Buenos Aires, Argentina. He later divided his time between homes in Mexico City home and London, where he did most of his writing.
Fuentes was married from 1959 to 1973 to actress Rita Macedo, with whom he had his only surviving daughter.
After the couple divorced, Fuentes married Lemus, and they had two children together. Their son Carlos Fuentes Lemus died from complications associated with hemophilia in 1999, and Natasha Fuentes Lemus died in 2005 after a cardiac arrest.
Fuentes also acknowledged having affairs with actresses including Jeanne Moreau and Jean Seberg.
As he grew older, Fuentes left many novels unfinished with imperfections and "wounds that make the book bleed," he said.
He continued to publish essays and do public speaking to the very end, including the day he died. In an opinion piece in the newspaper Reforma, he expressed optimism for the new government of Francois Hollande, who was sworn in Tuesday as president of France, saying he hoped it would be "defined less by its technocratic profile and more by what the French understand as 'humanism' ."
Fuentes, however, always postponed writing about himself.
"One puts off the biography like you put off death," he said. "To write an autobiography is to etch the words on your own gravestone."
Associated Press writers Marjorie Miller and E. Eduardo Castillo contributed to this report.
Some reaction to the death of Mexican author Carlos Fuentes:
"Carlos Fuentes has died. One of a kind. An era, a genre. A writer for all seasons. To Silvia, all my affection." Mexican writer Hector Aguilar Camin
"Thanks for his words and his thoughts. Goodbye Master!" Consuelo Salazar, director of Mexico's National Council for Culture for the Arts
"Author of lasting novels and short stories, a vigorous, enriching presence. I think the center of his literary creativity was language. The renovation of language." Enrique Krauze, Mexican historian considered Fuentes' harshest critic
Fuentes was "one of the most brilliant writers of the 20th century." Krauze
"I deeply lament the death of our beloved and admired Carlos Fuentes, a universal Mexican writer." President Felipe Calderon
"What sadness. Carlos Fuentes has left forever. I send all my affection to Silvia, his true and only love. Mexico is in mourning." Mexican writer Guadalupe Loaeza
"I'm deeply sorry for Carlos Fuentes' death." Mexican writer Elena Poniatowska
"Mexico has suffered a great loss." Mexico City Mayor Marcelo Ebrard
"I'm terribly sorry for the death of Carlos Fuentes, Mexico's greatest novelist, a generous friend. A big hug to Silvia and Cecilia." Mexican writer Jorge Volpi
"I send my condolences to the family of the great writer Carlos Fuentes. Rest in peace Maestro." Salsa musician and actor Ruben Blades.
"Carlos Fuentes was a brilliant intellectual but also a very generous and fun man. We will miss him." Peruvian writer Santiago Roncagliolo.
"A big hug to the family of Carlos Fuentes. A very sad day." Mexican actor Diego Luna.