Re: Good/evil, what's the difference?
If the drug improves the quality of life beyond that which it would without, then it is good. If it takes away from it, it is bad. It can be black and white, you have to take the emotional feelings out of it and use just pure logic and judgement.
The same with pulling the plug or inducing morphine overdose on a dying patient, yes your killing them, but if living was torture and you had there express permission then it was a good thing.
War is the result of conflicted ideas or opinions, the inability to cooperate. It is never a necessity until the day comes when there are to many people and not enough planet and the loss of human life is a necessity.
He who casts the 1st stone was being selfish and/or ignorant or hateful all qualities of evil, no matter the self righteous excuse used to justify it, violence isnt the answer. The only time violence is justified by any means of reason is when peaceful resolution is no longer an option and destruction is imminent unless you respond with force to save yourself or those you care about.
This puts you in a unique situation, if you neutralize the offender, you have the opportunity to extend mercy to them, even nurse them back to health to show your humanity, That is a good thing, definitively good.