The idea of cause and effect resulting from time travel to the past is a fascinating topic that has been explored in various science fiction stories and theories. However, it's important to note that time travel remains purely speculative at present, and there is no scientific consensus on its feasibility or the specific consequences it might entail.
In some fictional narratives, time travel to the past is depicted as potentially causing changes that ripple through time, altering the future in significant ways. This concept is often associated with the "grandfather paradox," in which a person travels back in time and inadvertently prevents their own birth by, for example, causing the death of their grandfather before he conceives their parent.
The implications of such paradoxes and their resolution are often open to interpretation and depend on the rules established within a given fictional framework. Some theories propose that alternate timelines or parallel universes would branch off when changes occur in the past, thereby preserving the consistency of cause and effect.
It's important to reiterate that these ideas are purely speculative and hypothetical. Time travel remains unproven, and its consequences, if achievable, are unknown. The question of whether traveling back in time could cause significant changes in the future remains an intriguing topic of imagination and theoretical exploration.