Stipulations:
- You cannot die and are immune to disease
- You cannot alter the future such that you change the world from your point of origin. i.e. You cannot become so famous that future people recognize you as immortal.
- If you vary the timeline too much you will cease to exist.
“If you vary the timeline too much, you will cease to exist.”
Even if you want to be altruistic enough to sacrifice yourself for the good of humanity, you’ll be wiped out long before you’re able to change enough to lead to lasting improvement.