I agree with JtotheA. Why would we want to go back in time?

The problem exists also that if we could go back in time, how would we change our future? Lives would change and not always for the better. One person may find ways to control us in ways we don't want to be controlled. What if they change things to benefit only themselves. What if the guy that liked my mother and never married her, decided to go back and marry her, then who would I be?

There are to many questions left unanswered by time travel and I for one would not want to see the results of an altered world.