What is the theme of a sound of thunder?

"The Sound of Thunder" is a science fiction short story written by Ray Bradbury. The main theme of the story is the consequences of time travel and the butterfly effect.

The story follows a group of wealthy hunters who pay to travel back in time to hunt dinosaurs. However, they are strictly instructed to follow a set path and not disturb or alter anything in the past. One of the hunters, Eckels, becomes frightened and steps off the path, causing a butterfly to be killed. When they return to the present, they find that the world has been drastically altered as a result of this seemingly minor change.

The story explores the idea that even the smallest actions can have far-reaching and unforeseen consequences. It serves as a cautionary tale about the dangers of tampering with the natural order of things and the importance of respecting the past and its impact on the present and future.