“Come on, that’s such a canard, you know that,” Oliver Stone said. “ ‘The Greatest Generation?’ That was the biggest publishing hoax of all. It’s to sell books.” This seemingly sacrosanct term was coined by Tom Brokaw for his 1998 book of the same title, in which he recounted the lives of ordinary, World War II-era Americans. “I was in Vietnam with the Greatest Generation. They were master sergeants, generals, colonels. They had arrogance beyond belief. The hubris that allowed Henry Kissinger to say North Vietnam is a fourth-rate power we will break. The hubris of that!”

We were discussing Stone’s latest project, a 10-part Showtime series and a 750-page companion volume called “The Untold History of the United States,” which begins with World War I and ends with the first Obama administration. It’s an Oliver Stone version of a History Channel documentary, one guaranteed to raise the ires of both left and right and where all roads lead to Vietnam. From where Stone sits, World War II begot the cold war, which landed us in Vietnam, a manifestation of American imperialism, which led inexorably to our current battle in Afghanistan. We have, Stone says, been sold a fairy tale masquerading as history, and it is so blinding it may ultimately undo us. “You have to understand what it was like to be a Roman empire and to find some barbarian tribe riding into Rome in 476 A.D.,” Stone said. “It’s quite a shock. And that’s what will happen to us unless we change our attitude about what our role in the world is. Every story out of most newspapers is ‘the Americans think this, the administration thinks this.’ It’s always about our controlling the pieces on the chessboard. I think what the Arabs have shown us is that we don’t control the chess pieces. And this is a shock to many people. But it’s definitely in ‘The Greatest Generation.’ And it’s in Spielberg’s World War II film, and it’s in Ridley Scott’s ‘Black Hawk Down.’ These are wonderful-looking films, but the message is perverted.”

It was a late September morning, and Stone was sitting on the terrace of his hotel suite in San Sebastián, Spain, where his latest film, “Savages,” was being screened as part of the city’s 60-year-old film festival. The sun was peeking through some late-morning clouds, glinting off the river below, and Stone shielded his eyes with a pair of sunglasses that could have been part of Kevin Costner’s wardrobe in “JFK.” At a news conference he gave the day before, he suggested that the former Spanish president José María Aznar should be tried at The Hague on war-crimes charges for his participation in Bush’s Coalition of the Willing during the Iraq War. The remark presumably only enhanced his status in San Sebastián, where he was presented with the Donostia, the festival’s lifetime achievement award. Before the premiere of “Savages,” Stone walked the red carpet with John Travolta and Benicio Del Toro, waiting, a bit impatiently, as Travolta, Bill Clinton-like, shook the hand of every fan reaching out to him from behind the barriers, kissed old ladies and posed for innumerable cellphone pictures; Stone shook some hands, too, but demurred when asked to kiss a small dog. “Allergies,” he explained, pointing to his nose.

“Savages,” based on a popular 2010 novel by Don Winslow about a couple of boutique marijuana growers who are drawn into battle with a brutal Mexican drug cartel, covers terrain that is near to Stone’s heart. To promote the film, he appeared on the cover of High Times, puffing on a thick joint. I mentioned to Stone that the reporter who interviewed him for Playboy in 1987 later wrote that the drunkest he’d ever gotten was with Stone, in Southampton, where Stone was filming the beach house scene in “Wall Street.” The reporter remembers several bottles of bourbon, and then little else until he woke the next morning, soaking wet. He’d passed out on the hotel lawn and was roused when the sprinklers started up. Stone chuckled. “That is funny,” he said. “Because we’ve all had moments on lawns where we passed out. One time I was in the Bel-Air Hotel. I woke up in the bushes, and I couldn’t find my way back. And my new wife was waiting. It was kind of a honeymoon. I remember stumbling in and her face when she saw me.” Was the look on her face one of horror? I asked. “Well, it was like she was in for something with the marriage here,” he said. This was his first wife, Najwa Sarkis, he clarified (he has been married to Sun-jung Jung, his third wife, since 1996).