I strongly, strongly disagree with this. If you go around murdering troll infants and children in their sleep for the greater good as your only goal in life, you're Evil. Sure, it probably does make for a better world, realistically. You can be Evil by using Evil actions against Evil creatures.
As for Aragorn, I simply can't imagine him attacking an Uruk-hai who defended him, Gimly, and Legolas against orcs while still in the midst of the ambush. I think that even if the Uruk-hai went down against the orcs, he'd check him and do his best to nurse him back to health. Aragorn was an honorable man, and I think he'd feel a debt to any creature that fought by his side.
The troll did not defend this party, it was a third party of combatant. It did not jump in screaming "I'MA HELP YOU LOL".
If the same had happened to the Fellowship, Legolas would have it pumped so full of arrows that it would be dead before it hit the ground, and added another tally to his list of kills.
Aragorn would not have checked him, nor would he have nursed it back to health. He would have killed him during the combat, as can be evidenced by their being no point during any of their battles where he walked around after a battle and gave cookies and tea to the injured (but not quite dead) opponents.
Celebrim said:
So do many humans, does this make them the equivalent of venomous spiders in the real world?
Relating a troll (usually evil) to something in the real world (venomous spider) was a way for me to put across the idea that should be held into belief by any Good (D&D) NPC. Squash the troll before it squashes you.
This is the same reason that people hunt Evil Dragons, Demons, Devils, etc.
Celebrim said:
It's a core tenent of many of the people in this universe that there is a battle between good and evil, and it is a core tenent of many of the worlds philosophies that people are "usually" or "always" evil beings. Yet if these real world philosophies adopted the policies you say are good, would you call them good?
I honestly don't understand what either 'good' or 'evil' mean as you describe it. So far as I can tell, they are just tribal labels under such a description.
You are telling me that there is no situation in which the above murder wasn't justified? It was a troll, and so deserving of death? It doesn't matter to you if perhaps it wasnt' a troll, but the victim of some hag's curse - which suitably explains why the troll wasn't acting trollish? It doesn't matter to you if the troll is the sworn servant of a god aligned diety, and the means by which the deity plans to redeem a significant portion of the troll race from the bondage to some god of chaos and evil that they now serve?
The philosophies of the real world have no bearing on the philosophy of the core D&D universe. In the real world, there is no definition of Good or Evil. Philosophers have been trying to determine these answers for thousands of years, and no one can agree.
The D&D universe spells it out for us. (And yes, if the same applied to the real world, I would be very pleased. There would no longer be moral arguments about things like genocide [can be a good thing], abortion, stem cell research, vegetable states, etc.)
If the troll was actually a human polymorphed somehow into a troll, it would have turned into a human when it died. It did not.
If a troll is (somehow) Good (we would obviously have to talk to that DM to find out), it would have made it's intention very clear when it entered combat. By declaring his intention (to aid the PC's in a dangerous battle), even while fighting the orcs (instead of before entering combat), he could have saved his own life. He did not, and in the same fashion that those who win the Darwin Awards do, he deserve his fate.
Celebrim said:
In the situation we are describing now, I can't imagine Aragorn beating the Uruk-hai into submission. Seriously, the whole story of The Lord of the Rings was about the providential effects of mercy. Bilbo and later Frodo spare a monsterous cannabalistic murderer who deserves death, because neither of them feel just in striking him when he is helpless and defenseless. And you are telling me that you think story is about ruthlessly slaying the enemy just because they are the enemy? Are you sure you aren't misjudging Aragorn's character?
Aragorn would have killed it. He would not have beaten it into submission, he would have killed it. This is because the Uruk'hai are either "usually" or "always" Evil.
In the end, Frodo kills that monster, and should have from the beginning. However, they decided to use the monster instead of killing it, which, really, is a form of coercion if you think about it, akin to torture.