The concept of time travel is largely speculative and theoretical, as there is currently no scientific evidence or consensus on its feasibility. However, in the realm of science fiction and popular imagination, time travel often involves the ability to alter the past and potentially change the future.
In many fictional works, time travel narratives often explore the idea of altering events in the past and observing the resulting changes in the future. According to some theories, such as the "butterfly effect," even minor changes in the past can have significant and unpredictable consequences for the future.
It's important to note that these ideas are purely speculative and do not reflect our current understanding of time and causality. In the context of real-world scientific theories, such as Einstein's theory of relativity, the possibility of changing the past or the future is not supported. According to these theories, time is a dimension that is intertwined with the fabric of space, and events occur in a cause-and-effect sequence.
That being said, if time travel were to be discovered and found to be possible, it would likely have profound implications for our understanding of causality and the nature of reality. The question of whether time travelers could change the future would depend on the specific rules and mechanics of time travel within the hypothetical framework.