I would define evil as pleased to cause suffering.
I have tried to define good and evil without taking into account the humanity.
If the humanity would not be, what would mean good and evil?
I have not managed to define good and evil in these conditions.
I think the notion of right and wrong is an exclusive feature of humanity.
There are people who to achieve their purpose, hurt others and do not care about their suffering.
Their aim is not to hurt you,to make you suffer, their goal is different, and to achieve their goal they are able to do anything.
That is bad, is wrong,is immoral , is animalistic.
The worst is when they willingly want to make you suffer.When your pain causes them pleasure, satisfaction.
Animals have no mercy and compassion,but they do not want you to suffer and they do not feel pleasure in your suffering.
Sadisticness is the purist form of evil but where does it come from?
Abuse victims trying to medicate their own feelings of weakness?
A caveman instinct to establish a prehistoric version of "street cred" by becoming known as someone who terrorizes others? When people fear you you can have your way. But if your terrorizing is done in secret because you fear law enforcement then only your victim knows that you must be given your way.
from
http://en.wikipedia.org/wiki/Michael_Ledeen Jonah Goldberg, Ledeen's colleague at National Review, coined the term "Ledeen Doctrine" in a 2002 column. This tongue-in-cheek "doctrine" is usually summarized as "Every ten years or so, the United States needs to pick up some small crappy little country and throw it against the wall, just to show the world we mean business," which Goldberg remembered Ledeen saying in an early 1990s speech.[27].
This may have been what the US was doing in Haiti when it overthrew Haiti's democracy. Not exactly sadistic as in enjoying the victims suffering but sadistic as in using the victims suffering as a warning to others as to what happens to people who do not obey or resist you when you want to steal.
Getting off on your own powerfulness comes very close to sadism when you must hurt others to appreciate your own power. In this case the other's suffering only is interesting because it lets you see your own relative power.
I have seen dogs that enjoy hurting other dogs. They have already established their pecking order dominance but they continue to abuse.
I have seen cats playing with mice. This is torture fore the mice but it is play for the cat. "Play" is activities that are instinctually programmed to cause enjoyment because they sharpen some skill that the DNA knows might be a useful skill. Children and young animals play-fight but they usually don't hurt each other much. In many families older brothers do hurt their younger brothers and make them cry.
Torture may be some outgrowth of pecking order.
Such sentiments only humans can have.
Unfortunately almost all people have in them a greater or smaller part of evil.
Who has not wanted, more or less, to get revenge? What is revenge if not pleased to cause suffering?
Revenge is a characteristic for humanity and not for animals.
So,who is evil,the animals or the humans?
The beginnings of revenge can be seen in animals.
Does revenge give pleasure or is it more like the relief form of pleasure that scratching an itch gives or the relief that smoking a cigarette to suppress lack of focus and suppress stress gives. Relief of suffering seems to me to be a different kind of pleasure than enjoying something nice. People are angry at the criminal and can't let go of that anger until they have hurt the criminal. Then after the criminal has lost enough for committing the crime the criminal can be forgiven and the anger against the criminal can be dropped.
Some say that ignorance is the true evil. To not feel the suffering of others and to not see the futility of desire are the ignorances that cause suffering. Wanting things to be other than how is the cause of all suffering but it is ridiculous to expect any but the highest yogi's to be able to accept existence as it is. Being something capable of surviving requires not seeing the suffering of others as equally important to the suffering of yourself.
I heard a story. A ruthless military commander was invading the land of his enemies. He and his troops were making a point by killing and torturing everybody and showing no mercy. Soon everybody had heard of the horror of this commander and every villager would flee to the forest when they heard that the troops were approaching. Town after town village after village the commander would find empty of people. Then he entered one town and by the well in the town square there was a monk calmly sitting. The Commander walked up to the monk and bellowed "Don't you know who I am? I could run you through with my sword without even batting an eye." The monk calmly answered "Don't you know who I am? You could run me throw with your sword without me even batting an eye."
But we are not like that. We can't accept. We can not be calm and we can not accept, and the sadist enjoys his power over us knowing that while we do not accept we are unable to resist. We want revenge when we are wronged and we will be miserable until we either get the revenge or get tired of the issue and just drop it.