I'm relatively new to writing, and through my stories, I have only dealt with an urbane villain, the whiny teenaged one, and the complete psychopath, but I wonder about the people who write for other genres of villainy. How do you make your villains evil? Why are they so evil, and how can you present it?
Your adversary doesn't have to be evil; he just has to get in the way of what the main character wants. But if you want to contrast the heroism of your main character with the villainy of your adversary then there are a few things worth considering. These come from Joseph Campbell's
monomyth theory, partly via James N. Frey's writing book:
The Key. Your adversary should:
- be virile, competent in his field;
- be an outsider;
- have a wounded past;
- not be born to destiny (but may pretend or seem to be born of destiny);
- want something that puts him into conflict with your main character;
- be selfish, vengeful and cruel;
- be afraid (often secretly afraid)
The 'evil' is optional. It's sufficient if the adversary is less sympathetic than the protagonist. But audiences love to hate a villain, so let's look at evil in detail.
I consider evil to be 'badness that is also taboo'. Badness could be selfishness, vengeance or cruelty -- although sometimes heroes exhibit these qualities too (e.g. Dexter, Conan, or Dirty Harry). Or badness could just be some behaviour that either prevents necessary good (e.g. stop the medicines reaching the sick), or causes harm (e.g. start a war between two friendly cultures).
What makes the badness also taboo depends on how the acts take place, and your readers' cultural taboos. When badness also breaks taboo we begin to describe the bad-doer as an evil-doer.
Some examples of taboos in Western society include: harming infants, children, women, the poor, sick or the elderly; abduction of children from their families; incest; rape; desecration of the dead; desecration of religion; casual use of weapons of mass destruction; abuse of professional trust (e.g. doctors, lawyers, police, government, judicial or clerical powers); harming civilians during military conflicts; genocide; religious and racial intolerance; cannibalism; attacks on democracy; attacks on sacred institutions such as the church, the judiciary, or government buildings; attacks on symbols of statehood such as monuments and major architecture; permanent damage to the environment; brainwashing; torture; involuntary manipulation of an individual's genes; the use of force against the innocent.
'Good vs evil' stories are a staple of epic fantasy and of space operas. However, a lot of SF is not 'good vs evil' but a clash of cultures. And some fantasy subgenres (e.g. Sword and Sorcery, Cyberpunk) tend to be 'bad vs worse' rather than 'good vs evil'.
On the up-side, good vs evil stories have enormous popular appeal. On the down-side they tend to be trite, simplistic, predictable, melodramatic and often triumphalistic -- even jingoistic. You can see examples of this in
Lord of the Rings, Star Trek, Star Wars, Starship Troopers and
Harry Potter.
Science fiction is especially good at exploring our taboos -- sometimes other cultures look evil because they break human taboos. Later you may discover that what they're doing isn't even that bad. A good example is the Hugo and Nebula-nominated
The Mote in God's Eye (1974), by Larry Niven and Jerry Pournelle. It's about a first-contact with a race that routinely commits infanticide.
My advice: have fun writing evil adversaries but don't be limited to all adversaries being villains, or all villains being evil. There's a lot more to explore morally, sociologically and psychologically than simple good vs. evil tussles. SF and Fantasy are excellent vehicles for exploring moral ambiguity and turning reader prejudices on their heads.
Hope this helps.