(Thanks to commenter roundeye, too.)
By the way, Secretary of State John Kerry's recent attempt to improve Russian-American relations by exclaiming "This is not Rocky IV," when, yeah, now that you mention it, it kind of is Rocky IV, reminds me of the underrated intelligence of Sylvester Stallone at sensing where guys' heads were heading. As an analyst of where modern culture was going, was anybody else as perceptive as Stallone was in 1976 to 1985?
The usual assumption today is that, well, sure, Arnold Schwarzenegger was obviously always a shrewd guy, but Stallone was kind of a meathead. Yet Stallone wrote one of the ten most influential screenplays in movie history in Rocky. I'm sure somebody before Stallone made a movie about working out and getting into shape, but Rocky's montage scene was a bolt from the blue in skinny 1976. Hollywood immediately knew it was an all-time great script, so Stallone was able to leverage the demand for his screenwriting talent to insist upon the right to play Rocky himself.
And Rocky IV is a bizarrely different from Rocky: while Rocky has all the great lines Stallone saved up from his first 30 years of life, Rocky IV has almost no dialog, just insane images. (And that's not to mention Stallone's Rambo movies.) So, while I'd much rather invest my money in a real estate development put together by Schwarzenegger, Stallone had more moments of genius in his decade.