Remember in Back To The Future when Marty McFly's brothers and sisters (and himself) started fading out because he was failing? Did that make any sense?? That was the first time I really started thinking seriously about time travel.
Basically, I am of the opinion that you can not change the past. IT ALREADY HAPPENED. Some people talk about different timelines or universes or whatever. BULLSHIT. Either you're going back in time or you're not! You could go back in time to ensure that something did happen, but it would turn out that you had been there all along. Even if you managed to change something, if you truly changed it, you would only remember it as something that had always been that way, and you probably wouldn't go back in time to change it, so that creates a paradox. So forget that.
Check out Terminator, this is an example of somebody really getting it. The Terminator goes back in time to try to change something, but they only ever end up moving closer and closer to the future that the Terminator came from. That's what I'm talking about!! It turns out that he was there the whole time! And the dude they send back to stop the Terminator ends up becoming John Connors' dad! It never happened without him, BECAUSE YOU CAN'T CHANGE TIME. They were sending somebody back in time to change something, but they didn't realize that they were only fulfilling what had already happened.
I'm also a fan of Bill and Ted promising to go back in time - at a later date - and fixing a problem that they had that very moment. Why don't more people do this in movies?? Let's say I'm in a shootout with some crazy Indians (in the Wild West), and I'm really outgunned. I can plan to come back in time at a later date and give myself some reinforcements, and as long as I follow through with that, I'm good, right? There could be 100 of myself, totally shooting all the Indians. I don't have to live through a "timeline" without reinforcements, and then go back and change it, I just have to make it so that it's ALWAYS LIKE THAT.
If you would like to change something that happened in the past, it just couldn't be possible. It already happened. If you end up in some other "timeline" or "multiverse" then you aren't time traveling, you're visiting a parallel universe in a way that resembles time travel.
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