Thank you for your offer of assistance. All I can ask is that you be vigilant. Currently my only hope is that the future I came from is not the one I will return to.
What is your future like? And can it be changed?
Is the future set in stone? If not, are there multiple timelines depicting multiple futures? If that is the case, then why are you here to begin with? Your future obviously still exists, and you changing anything in this timeline would simply create a new off-shoot timeline, not change yours. Isn't that right?
Time travel is a complicated business. Your many worlds hypothesis comes closest: there are an infinity of wordlines, each running parallel, though only one is real. As soon as time travel is invented, however, it is possible to go back to the past: and in doing so, the future from that point is pushed onto another worldline.
Only one timeline can be real (Grant's Conservation of Temporal Potential) so if I succeed in changing events enough here, the future I come from won't have actually happened, except in my memories and experiences.
The future can change, theoretically. The one problem we've found is what we've termed 1%-divergence. If you go back to the past, events are shifted onto the nearest worldline in which those events occurred: which means that it's shifted to the closest possible match to what I consider my present. I could kill the parents of the man who serves as dictator of Switzerland (the political powerhouse in my time), and someone very similar to him would end up taking his place. Even if I only change events after the year 2015, a nearby worldline may have an altered past: so long as all the events were in motion for me to change an event, even the past could alter on the nearby worldline, to ensure a close match.
1%-divergence is not proven, but there is a worrying amount of experimental data. I'm hoping that either a sufficiently large change, or a multitude of them, will be enough to push past that barrier. Hopefully the fact another me has come here before will be an aid.