John Rambo spent the 1980s knifing, booby-trapping, and exploding his way into the American consciousness. But to resurrect this killer of a character for the 2000s, Sylvester Stallone dug deep into the heart of his hero… and dear God, that heart was dark.

Released in early 2008 to solid box-office success and minimal critical favor, Rambo promised a back-to-basics approach to Stallone’s hit action franchise, just as 2006’s acclaimed, heartwarming Rocky Balboa had done for The Italian Stallion. Stallone even planned to title the movie John Rambo to make the comparison even more direct, and wound up using that title for the film’s longer, more character-driven extended cut. But while the fourth and final film in the Rambo franchise gave Sly’s troubled Vietnam veteran a happy ending at last — its closing shot shows the 60-year-old killing machine returning to his family farm in Arizona for the first time in decades — it also gives us a character to fear, not root for. This evolution of Rambo as a character and mainstream action franchise, in turn, reveals uncomfortable, disturbing truths about the United States, and after a recent revisit, suggests that our own violent history should be treated with far more nuance than unquestioned cheerleading.

Set in the killing fields of Burma, Rambo is a brutal and bracing revisionist take on a hero whose name is synonymous with mindless action-movie excess, from the man who helped craft that excess in the first place. Yet it’s precisely because of its unprecedented savagery that the film feels truer to John Rambo’s roots than either of the sequels that preceded it: the movie, this time directed by Stallone, takes the philosophical tensions and fear of warfare present in the franchise since its politically fraught initial installment, loads them into a machine gun, and fires them directly at our collective face. Using all the tools at an old Hollywood hand’s disposal, it reflects the national mood by depicting its angry American as both suffering and inflicting trauma, in as traumatizing a manner as big-budget action movies have ever attempted.

Three thousand words on Rambo for Thrillist? Don’t mind as I do. I’m proud of this piece on one of the most viscerally disturbing and structurally odd mainstream action movies ever made.