If someone were to hypothetically travel back in time and commit a harmful act, the repercussions and potential fixes would depend on the specific circumstances and the rules governing time travel in that hypothetical scenario. However, I can outline a few possible approaches that are commonly explored in fictional narratives:
The "Butterfly Effect" Solution: One common concept is the idea that altering the past can have far-reaching and unpredictable consequences on the future. In this scenario, attempting to fix the harm caused by the time traveler might lead to unintended and potentially worse outcomes. The solution, in this case, might be to accept the altered timeline and work towards improving the future from that point onward.
Time Paradox Resolution: Another approach involves resolving time paradoxes that arise due to changes in the past. For example, if the time traveler's actions caused significant harm, they might try to undo their actions by going back in time again and preventing their past self from committing the harmful act. This would create a paradox, but fictional scenarios often employ concepts like alternate timelines or parallel universes to resolve such paradoxes.
Restoring the Original Timeline: In some narratives, the goal is to restore the original timeline and undo the damage caused by the time traveler. This could involve finding a way to reverse the actions or events that led to the harm, potentially through further time travel or by utilizing some form of advanced technology or knowledge.
It's important to remember that time travel is a hypothetical concept, and any resolution to the consequences of time travel would heavily depend on the specific rules and logic of the fictional or theoretical framework being considered. In reality, as far as our current scientific understanding goes, time travel remains speculative and not yet achievable.