User:CaptainTybusen/Time Travel Theories

This has been on my mind a lot lately. It's the theories on how time travel affects history. I've come up with three basic ideas. Do you have any others? Which ones do you believe in?

These are my ideas:
 * Paradox Theory - The theory in which events altered by time travelers create a new paradox in which reality is altered.
 * Continuum Theory - The theory in which events altered by time travelers have already been destined to happen (in other words, you can't change the timeline).
 * Multiverse Theory - The theory in which there are already multiple futures set out in front of us, and changes in the past and present change which future the timeline branches out to. You can find a little more about this on the Legacy fiction.