Why All Films Have This Disclaimer

Movies that are fiction have a disclaimer that tells the audience that it is fiction -even for comic book superhero movies. Like every common disclaimer, this one has an interesting story behind its use. The precedent involved, believe it or not, Rasputin. His story was such a good one, it had to made into a movie, even while the principles were still alive. That was a mistake, especially that one part that was fictionalized. Cheddar tells the story.