Think about classic fictional "bad guys", they tend to take two basic forms: primal and beastly or intelligent and superior. As well as any conceivable combinations, all of which could easily present a threat to the mediocrity. A good, every man type construction worker, or an upstanding, white collar middle management type can hardly sympathize with a werewolf or evil master mind. The brutish thug or the coldly logical cyborg, would seem to represent extremes in human nature. And people tend to hate and fear such extremes, often because they are so different and sometimes because they hit a little too close to the mark.

It has been noted that people often demonize their enemies. One reason for this, is people tend to call things that can hurt them evil (which may help to explain why religions tend to reject the most earthly and primal elements of life, everything can kill you). People, of course, being the egotistical beings they are, prefer to think of themselves as good, so anything which is against them must be evil. A lot of the good and evil line drawing which occurs stems from the basic fear of the unknown. Anything which is alien or unknown to a person can be scary, and naturally; that means it's evil.

It's very telling that two of the most frightening and common ideas about the future of the world are the deterioration or destruction of society, and that of significant technological advancement. The earth as we know it ending, or progressing further. It would seem that people would like things to remain the same, or in other words, fear of change. This is of course, extremely irrational, considering the fact that change is the only constant. It's no wonder why concepts like ambition, technology, scientific advancements, evolution and other progress related ideas are often considered evil. Many people have observed that it's often easier to remain in an unpleasant situation than to dive into a new one.