Going back into the past would be a too big burden on my conscience in both cases ; with the ability to go back to present or not. I mean, I KNOW about the terrorist stuff and countless wars which happened, I know about mankinds wrongdoings to nature and animals etc. ; and I also know, even with the ability to go back I would not be able to prevent all that sh1t from happening. So it would be too much a psychological burden and stress on one single person.
In movies like Back to the Future they just \'forget\' implications such as these.
There\'s also this twofold motivation problem for going back ; are you going back to better the world for everybody and everything ?
OR...
are you going back just to benifit yourself ?
So...I\'d choose going to the Future. I might see stuff I\'d never imagined possible ; a real "thinking outside of the box" expierence.
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Going to the future also means no selfish benifit becuz all your knowledge will be quite obsolete or out of fashion. In other words ; you\'re gonna begin with a fresh clean slate like a newborn. ......................... Neo !???
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