There is an allusion to historical development in Bradbury's short story.
When the safari goes back in time, Eckels is in awe of what is in front of him. He is overwhelmed with the picture that he sees. Travis is wise enough to understand it clearly and he talks about the reality in front of them:
Christ isn't born yet," said Travis, "Moses has not gone to the mountains to talk with God. The Pyramids are still in the earth, waiting to be cut out and put up. Remember that. Alexander, Caesar, Napoleon, Hitler-none of them exists.
Travis alludes to the historical development of Western Civilization. Referencing Christ and Moses embraces the Judeo- Christian tradition. Identifying the Pyramids is reflective of the Egyptian cultures, while mentioning Caesar reflects the Romans. Travis is also alluding to the dangers of power being consolidated in the hands of a single person. This is seen in the The reference to Napoleon and Hitler. Travis's allusion is also reminiscent of how the election in 2055 has helped to safeguard the anti- monarchial tradition in the future. The allusions that Travis employs reinforces the history of the West and enhances the immensity of what the time travelers are actually doing.