Good/evil is what we make it to be. There are those who are raised to think that torture and violence is evil, and there are those who think that hippies and communists are evil. Good/evil is relative to the individual, but often influenced by others. What is "evil" to one person may not be "evil" to another. Same goes for "good."
Also, just to say, though I speak of evil as being relative to the individuals, I am an absolutist and what I find to be evil I will apply to others, places, and times. This is going into relativism vs. absolutism, which we are not specifically talking about, but I image it could be applied here.
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