The theme of "The Monsters are Due on Maple Street", a teleplay by Rod Serling, is that you shouldn't start pointing fingers at each other without evidence and let suspicion take control of you, because you could just end up blaming innocent people and upsetting them. On page 14 in The Monsters are Due on Maple Street, after Charlie shoots Pete Van Horn dead, Charlie states, "Steve—you know why I shot! How was I supposed to
know he wasn’t a monster or something?" Afterwards, Charlie is claimed to be a monster and also hurt. This is an example of how their suspicion led to the killing of their good friend and other harm.
A meteor, Steve... Hang on, why did the lights turn off...
WHAT IS THAT
TOMMY STOP TALKING ABOUT YOUR COMIC BOOKS
This kid read too many comics, get him to bed, quick!
The aliens that look like humans don't want you to go.
You're the monster...No you!...Goodman, it's you, just look at how your car started...Steve, your wife said you were making some radio...
I shot the monster! Hooray!
A white flash flies overhead and all electricity turns off in the area.
People start questioning what the white flash was, and Tommy gives the idea that it was aliens.
The monster? Hmm... Ah! Tommy! TOMMY IS THE MONSTER!
People start accusing each other of actually being monsters.
And that, folks, is how they all die.
Charlie shoots Pete Van Horn dead.
Charlie says that Tommy had been the monster all along, and afterwords various electronics are turned on and off, with people getting more and more violent.
The humans themselves never solve anything, but the aliens explain to each other how the process of humans killing each other works.