タイムトラベルの概念を最初に取り扱った小説は何？
The concept of time travel by mechanical means was popularized in H. G. Wells' 1895 story, "The Time Machine". In general, time travel stories focus on the consequences of traveling into the past or the future. The central premise for these stories oftentimes involves changing history, either intentionally or by accident, and the ways by which altering the past changes the future and creates an altered present or future for the time traveler when they return home. Some stories focus solely on the paradoxes and alternate timelines that come with time travel, rather than time traveling itself. They often provide some sort of social commentary, as time travel provides a "necessary distancing effect" that allows science fiction to address contemporary issues in metaphorical ways.
The Time Machine