Good and Evil
Every work of fiction by any author deals with good and evil on some level. Put simply, protagonists (main characters) are good. Antagonists (the bad guys) are evil. There are shades of gray on both sides. Not all main characters are squeaky clean, without sin, or perfect in any way. Just the same, not all bad guys are completely bad or even always guys.
The main characters are the ones we root for, the ones we want to win out in the end. In the process, they face adversaries and their own frailties, weaknesses, or imperfections. Through this, they change, learn, grow as characters.
This applies to fiction in any genre, be it science fiction, romance, fantasy, mystery, horror, or thriller. And it doesn’t matter if it’s Christian or secular. These are the stories we want to read.
Imagine trying to get behind a purely evil protagonist as a main character who is out to wreak revenge, death, and destruction across the fictional world. Well, I suppose you could if you were a fan of H. P. Lovecraft and Cthulu. Still, most characters that resonate with readers are good, and/or strive to do right.
When we create a main character (MC), there are usually flaws or issues that make that character not perfect. True, the MC is the good in the story and will attempt to do the good or right thing. But, what is the good? Usually, the MC has to step outside of his or her self and do something for someone else, for the community, the country, or humanity. Sometimes, that involves battling against incredible odds, an overwhelmingly powerful opponent, city hall, or solving a particularly difficult murder case.
The MC struggles through adversity, resistance, and often directly against an antagonist to accomplish the goal. But, the effort is to do the right thing. Defeat the bad influence, antagonist, and put the world right.
The antagonist works against the MC. There is the ethically challenged city manager trying to skim from the city coffers. Then there is the competing love interest that uses nefarious methods to thwart the romantic efforts of the MC. Or, how about a dark evil being lurking in the abandoned metro tunnels, sending it’s minions out to thwart the efforts of the MC?
It boils down to the antagonist’s core motives of self: selfish, self-serving, self-aggrandizing. Not all the bad guys in fiction are purely evil. They may perform some acts of kindness out of a fractured attempt at redemption, but usually those fail. Unless, the point of the story is to bring the antagonist to some kind of redemption.
Life is full of examples on both sides of this duality. Most aren’t quite so well defined and obvious, but you can see them.