The concept of good and evil is tricky. I'm not a relativist, but I do play around with making cultures that find some distasteful things good and some permissable actions unthinkable.

I've found that "good and evil" are terms of individual conscience but "right and wrong" are relevant to the wellbeing of nations.

"Good" wraps of only the best--love, selflessness, wisdom, patience, mercy, a grab bag of virtues. It is everything that is good for a soul to exercise; everything that makes people better than animals, everything that makes us feel more human, more at peasce with ourselves and our surroundings. It is not a set of actions but a motivation.

"Evil" is everything that eats away at a soul and makes us worse than animals. It makes us feel less human, less at peace with our surroundings. At its core is selfishness, which pretty much all 'sins' stem from. It is a base motivation taken to the point where it stunts a soul from maturing into wisdom and goodness.

Actions can almost always be either good or evil because 'good' and 'evil' is a question of motivation.

For instance, if ritual cannibalism is a part of a culture and viewed as a compliment, a way of commiting the people and the people to that person, and someone refuses to eat because of squabble with that person, his motivation is evil and the action is wrong because refusing an aspect of the culture without good intentions is not good for the people.

While the seven deadly sins is great for pinpointing notoriously evil motivations, and Ten Commandments are a listing of almost unconditional wrongs (breaking them is usually a sign of evil intentions but the actions themselves are bad for peoples as a whole), the New Testament commandments are universally good: love God, love others, tell other people about this.