What is the name of the therom that states something like, if time travel was invented in the future where are all the travelers that are from the future? any help would be greatly apriciated.
I don’t know that there’s a theory per se, it sounds kinda like a sci-fi equivalent of the anthropic principle (the universe can support life because otherwise there would be no life to observer it). The answer, of course is: All around you.
You’re thinking of Stephen Hawking’s Chronology Protection Conjecture.
Or maybe it’s just that the no interference laws are working.
[sub]Hello me.
Stop prodding me, me.[/sub]
Reminds me of Fermi’s paradox re: aliens. If they exist, where are they? ('cause really, someone should have visited already, perhaps with a bundt cake or some cookies, just to welcome us to the galaxy. But no. Nothing. :()
As for time travellers, apparently they’re here, collecting crap computers to take back to the future. (Personally, I’d just rent a storage locker or something. Seems a much cheaper way of sending stuff to the future…).
Really though, consider if you had time travel. You could go to the past (where stuff has happened that everyone knows about, barring JFK or Jimmy Hoffa), or the future (which is all shiny and kewl and at the very least has today’s stuff at bargain prices). Now guess where all the time travellers are?
The theorem is only valid if you assume that a time-traveller with finite resources would actually want to go back in history to this point. Maybe there’s a really good party in the 22nd century they all headed to instead.
True, I mean after-all Rosie O’Donnell is still a public figure…

Larry Niven said that, if time travel is possible…it will never be invented. i.e., someone would invent it, and use it to go back and change the past (assassinate Hitler, whatever.) Someone else would use it to change something else, and everything would be chaotic, until, one way or another, a “stable” time line came about, in which no one invented time travel!
Trinopus