One of the biggest concerns with time travel is the impact on identity and free will. If someone were to travel back in time and change an event, what does this mean for the identity and free will of the people who were affected by that event?

Changing the past could potentially erase the identities of people who were born as a result of that event. This raises questions about the value of individual identity and the impact of altering the past on the people who exist in the present.

Additionally, altering the past could potentially impact the concept of free will. If someone were to change an event, does this mean that the people who were affected by that event didn't have free will in the first place? Or does altering the past mean that their choices and actions no longer matter?

These ethical considerations are complex and require careful thought and consideration. While time travel may seem like a fun and exciting concept, the potential impact on identity and free will cannot be ignored.

Works Cited
Foster, John. "The Paradoxes of Time Travel and the Problem of Free Will." The Journal of Philosophy, vol. 68, no. 15, 1971, pp. 457-466.
Lewis, David. "The Paradoxes of Time Travel." American Philosophical Quarterly, vol. 13, no. 2, 1976, pp. 145-152.