In a sound of thunder when the time travelers return to the world of 2005 how has that setting changed?

In Ray Bradbury's "A Sound of Thunder," when the time travelers return to 2005, they find a drastically altered world marked by tyranny and decay. The once-familiar environment is now dominated by oppressive regimes, and the subtle changes in language and social order reflect the consequences of their actions in the past. The butterfly effect of their time travel has led to profound and unsettling transformations, illustrating the fragile nature of reality.