The most powerful part of Bradbury's story is his articulation of the interconnectivity between the past, present, and future. Travis' tirade at the beginning of the story lays out the possible ripple effect which one ill-fated move can have on the future. Unfortunately, Eckels and the rest of the group realize this is indeed possible when they return after their trip. The death of a single butterfly has dramatically altered the world they once knew. The language has developed differently and an important presidential election was decided differently. It is a strong piece of advice to consider how your actions today can affect the future.