Hmm, time travel. Did you just see the new "Time Machine". I thought it was good, but remembering reading the book as a kid and then seeing the old B&W movie that follows the book, I think the first movie was better.
In order to not side-rail your thread, my answer is mixed. Knowing what my ancestors were realy like might change my opinion about myself. Right now I Know a fair amount of good about my ancestors and little negative. So I think my peragree is pretty good. You know, mixed breed, loyal and easy to get along with. To find that my ancestors were real jurks wouldn't suprise me so much as disapoint me.
As for knowing about my prosperity. What if they are all rotten to the core? Do I change who I am to change who they are? What if my life has little or no effect on who they become? Then I wind up living diferently for the wrong reasons.
So in the end I don't have enough information to answer the question. But if I had to chose between seeing the past and seeing the future... Wow, see the past and know if Adem and Eve were the first people and if Jesus is the Christ - - - Cool. But to know the future and be able to plan for it perfectly, Wow. Agian too hard.
I think I chose to see the future, one day at a time...