In his 1997 movie, Conspiracy Theory, Mel Gibson played a conspiracy theorist whose life becomes endangered when one of his theories turns out to be true.
Conspiracy theories have been a common obsession long before the 1990s. Especially The 1960s and 1970s who introduced several theories that are still popular these days.
Elvis Presley, Jailhouse Rock
The death of Elvis Presley on August 16, 1977, broke the hearts of fans everywhere. So much so that many of them refuse to believe it’s true. An American author named Gail Brewer-Giorgio is credited with popularizing the prevailing theory that Elvis faked his death. The theory, backed by claims of inconsistencies with his death certificate and a wax dummy in his coffin, resulted in countless “Elvis sightings” in which people claim to have spotted the former king of rock n’ roll in various locations after his so-called death. The first sighting occurred at an airport where a man who looked like Elvis checked into a flight using Presley’s alias. The sightings continue today and are frequently backed by photographic (or, rather, photoshopped) evidence.