Coble is talking a little about it:
Time travel is all about pulling loose one string, which can never be done without marring the fabric. The man he was all those other summers ago would just sort of look at me like I’d lost my own mind. I know that look. I get it a lot. If I were to travel across time it’d be the biggest waste of Suspending The Laws Of Physics.
And this is what interests me about time travel in the Sue Allen piece. I’ve got people living now who want to go back to the grand Confederacy. I’ve got people living then who want to escape to the future. I’ve got people who have traveled through time who can’t prove it, not really. And it’s a giant clusterfuck. Of course you’re not believed.
But more than that, in time travel stories, it’s always people who have good reason for doing it that do it. But it seems to me much more likely that it’s selfish idiots who would do it and, as such, would then not make much of it except for their own selfish gains.
There may be some heretofore unknown law of physics that would make time travel impossible, but I think, even if it is possible, human nature would make it a clusterfuck. Hell, we’re traveling into the future right now, very slowly, and we don’t bother to learn things about the past that could aid us in the future, even though those things are available for the discovering.
So, why would we be any different if we were allowed to skip forward or back in greater leaps?