"The Other"

The Other is a concept of other living beings that supposes they are hostile and inhuman because they are different. Everything he does is done with malice. He is not human like you, nor does he want the same things. You must kill him before he kills you first.

Many artists have tackled the concept of "the other" and have helped expand the concept of brotherhood to include all of humanity and even animals to a certain degree. In the science fiction book Starship Troopers, author Robert Heinlein argues that aliens, almost by definition "the other", might not be.

Fascists like the concept of "the other" because it gets people fired up to fight, and stifles criticism, because people who help "the other" are traitors.