There are certain stories that human beings tell over and over again. They're called “myths.” The solipsism or limited solipsism myth is one of them. Here are some others:
There's this round bauble you can get in a pawn shop or find in the gutter or get in some comic book store but it's really the Earth.
You finally find the answer to some hard question or experience the ultimate in something and the whole Universe ends.
You keep seeing a ghost or an alternate persona or something until you realize that you're the ghost and it's real.
Somebody looks past someone else's external appearance and sees a nice person.
Something seemingly innocent, like a doll or a clown or a carousel or an operating system turns out to be really, really evil.
If it shares some characteristics of humans but not all of them, like a wolfman or a vampire or a monster or a computer, it wants to kill you.
You're not sure if you're dreaming you're a butterfly, or you're a butterfly dreaming it's you.
Kid studies too much and loses his soul.
– epepke
related: Archetypes, Transpersonal Psychology, jung, grof, wilson etc+