Re: What is Evil?
It's a well-known fact that the quality of heroes is measured by the quality of the villains they face. After all, Luke Skywalker, a whiny farmboy, couldn't have become the hero he did without a villain like Vader. So, assuming the heroes of a given campaign are "Good," a GM should pay attention to what exactly "Evil" is.
In the last campaign I ran, I wanted to take a good look at the nature of evil and what drives villains to do what they do. I had two major villainous groups the PCs were working against: an incursion of demonic creatures into their world, and a secret organization bent on world domination. It was hard to say which group was "more evil"; while the demons were naturally inclined to evil, the organization often came up with countless ways to justify their "evil" actions, usually through pretty twisted (but understandable) logic.
The leader of that evil organization was a mage of world-shattering power. Early in his life, his betrothed had succumbed to a deadly disease that no one, not even he, could heal. From that point on, he was looking for a way to restore her to life. When he finally thought he had done so, he discovered that he had only animated her corpse with one of the more powerful demons I mentioned above. By this time, however, he had grown so old that he was himself trying to find the secret of immortality. This drove him to try and destroy the mythic source of time in the universe--which was also the very thing keeping the demons from escaping their prison and overrunning everything. The demon-betrothed was only manipulating him into setting them all free.
So I guess what I'm trying to say is that while naturally "evil" creatures or races are certainly ruthless and powerful, they're not nearly as interesting as "evil" people who still consider themselves to be "good." In the real-world campaign I'm working on now, the villain, a staunch Roman Catholic, is attempting to purge the world of depravity by bringing about the Apocalypse. This is almost inarguably an "evil" act, but performed with "good" intentions. (No offense is meant to any Catholics, by the way.)