With each coming decade, the history of horror films has always reflect the changing times, and the fears that accompany them. This documentary directed by Andrew Monument & adapted from the book of the same name by author Joseph Maddrey, tries to showcases that, by exploring its humble beginnings with silent era Gothic to 1930s Universal Monsters, to the Sci-Fi nightmares of the Atomic Age, to the present day reflection of real-world scares with 200 film clips of the various types within the horror genre, intercuts with archive news footages throughout the years. All divided into eight sections, each of which deal with a specific period of time and the socio-political context in which horror films of that era were born into. While, the idea of combining film from various sources to make something new is a controversial issue, with some people still, thinks it's stealing. I believe collage films like this, are fine, even if it seems like a glorious clip show. Nevertheless, it's still has problems in two important ways. One is the way, the documentary visually show them. "Nightmares in Red, White and Blue: The Evolution of the American Horror Film" doesn't present the film clips in their original aspect ratios, which means, that some of the film footages are zoomed way, too much to fit with the documentary's 1.78:1 frame or seemed cropped. Because of this, the film gives, somewhat half-ass blurry images of some of the subjects, tarnishing how good, these original films sources, honestly looked. Another problem with this approach, is how it cut down, on the suspense, that these scary imageries, were, original shown. It's really does strip down, the scare value. Only, leaving the somewhat distorted, out of context, disturbing fast-cut, quick blunt-force of violent gory imagery with large noises that could be, a little overwhelming to the senses & people's stomachs. The montages in this film can feel like being strapped to a chair, injected with drugs, and forced to watch films of sex and violence with your eyes propped open, as if it's 1971's 'A Clockwork Orange'. They can be a bit excessive & nauseating at times. Look, I get that the movie can't cover, all the material. That said, I love how all the film footages also supported, secondary by narrating from Lance Henriksen, whom does a great job, in establish credibility with his voice. However, I just wish, the information, that the filmmaker gave Heriksen wasn't so broad, without much context. After all, I really don't see much of a connection, in parallels between the charisma and motives of fictional antagonist Freddy Krueger of the Nightmare on Elm Street franchise and that of, former United States President Ronald Reagan, at all! Nor, how Leatherface from 'The Texas Chainsaw Massacre' can be compare with Osama bin Laden. Also, who though, it was a good idea, to brings in footage from 1969's "Easy Rider" and the James Bond films in a horror documentary? It doesn't make much sense. Another problem with the narrative is how short, some parts are. It really does make it seem, like they cut corners and really only skim the surface of a few pretty important moments in the evolution of the genre. I was really surprised that, the film didn't dig deep enough to explore the decline of the studio system, the rise of the independent movie movement, the advent of television, and the coming of the home video market. I get that, the movie can only go so far, but the whole sequence about the first ten years of the 2000s, seem a bit rushed. Look, I get that, streaming based viewing culture was still, starting out, when this movie was coming out, but, the documentary should had explore more, how the internet have change the industry, as a whole. It's kinda of, a big deal. Another thing, I think the film should get, some of their history, correct. After all, there were plenty of examples of events & movies, not fitting in with the chronological order, they were establishing with. Without going too much into detail, the idea that 1910's 'Frankenstein' is the first horror film is deeply wrong. I guess, the filmmakers never heard of 1896's 'The Devil's Castle' by film pioneer, Georges Méliès. Yes, I get that, it's technically, not an American film, but when talking the history of horror, you have to mention things like this, even if it's foreign. It doesn't make sense for a film to say that they will focus on Hollywood movies, yet talk about German Expressionist & Spanish Cinema and not much on Hammer Films, J-Horror or Italian Giallo. Obviously, a movie can't cover all the material that a book can, but to be fair, this movie should had been expanded into a three-part miniseries. It would had work better. The commentaries from the filmmakers, such as John Carpenter, Roger Corman, George A. Romero, Wes Craven, and others, would had more to say. Sadly, their interviews felt nothing, but sound-bites. Nothing really groundbreaking, came from their presence. It wasn't as entertaining and educational as it should had been. Overall: This documentary may not provide anything new for major horror fans, but it definitely worth seeing, even with its flaws. I just wish, it could had been better.