IF it is possible (but that's not the point of discussion here)
it has been a said a few times you still have two options left then:
1. you could try and kill your dad, grandfather, ... (or on mothers side too of course) but just when you try to pull the trigger, the mechanism fails and you can't change anything in the world anymore and everything stays the same
or
2. you can change stuff and in that case, it can be dramatic... what if you kill someone and later it looks like his great-great-great-great-great-great-great-grandchild will bring worldpeace or something?
Maybe during the process of saving them, you'd get seriously injured or someone else you know would end up dead. I don't really know what would happen, but psychologists say that if we time-travelled and changed something then the outcome would not be quiet what we expected.......
Re: If we time-travelled and changed things, would the outcome be worse?
someone REALLY likes the butterfly effect...
but anyway. it all depends on what you changed.
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I have no speech, no name. I live in the action of death, blood cry and the penetrating wound. I am destruction. Absolute and alone.
And they went back in time thousands of years to make the local people worship them like gods and make the locals be their slaves and have pyramids built for themselves and stuff like that.
And then they can have all of the local woman for themselves
They only have to find an area that they have proved did not contain any ancestors of the people in the modern world, and then they can do whatever they like and get away with it, as their futuristic technology will be able to cover it up. Like when they get bored, they can just move out and nuke the area, leaving no evidence of their existance there