I was looking at running a Star Trek RPG (system undecided, but probably Decipher's CODA) but was wondering how the setting would be altered if time travel were not possible. Perhaps the laws of the universe just don't allow it, or perhaps beings from beyond the universe (Q or such) choose to prevent it, but either way, what would the Star Trek setting be like if time travel is eliminated? I'm thinking that this happens from the beginning of time, not as in in-game event.