The theme of the story is that prejudices and hatred are the enemies of humanity. The people of maple street become superstitious. Soon, friends and colleagues take up arms against each other. The chaos even takes a few lives. It was all caused by aliens. The first example is when the mob forms around Mr. Goodman, when his car randomly starts. This shows the theme because this starts the suspicion. The next example is the killing of Pete van Horn. It shows that all this suspicion and worry can lead to deaths. The final example is the conversation between the two aliens. They talk about how this evil can rip places to shreds.