Saeviomagy
Adventurer
I find it interesting that in a world with concrete alignment and a guaranteed afterlife, it's actually not increasing the overall level of goodness in the universe to kill evil creatures.
After all, you know for a fact that when killed an evil creature heads off to one of the evil planes to become anything from sustenance for demons to a demon itself. Either way, it's alignment becomes incredibly difficult to change from evil.
Contrarily killing a good creature generates good souls which go on to their eternal reward, possibly becoming angels eventually. Again: alignment will almost certainly stay good for all eternity.
So if your aim is to increase the amount of good in the world, you should be killing good creatures before they have a chance to become corrupted, and redeeming evil creatures to prevent them from dying evil.
After all, you know for a fact that when killed an evil creature heads off to one of the evil planes to become anything from sustenance for demons to a demon itself. Either way, it's alignment becomes incredibly difficult to change from evil.
Contrarily killing a good creature generates good souls which go on to their eternal reward, possibly becoming angels eventually. Again: alignment will almost certainly stay good for all eternity.
So if your aim is to increase the amount of good in the world, you should be killing good creatures before they have a chance to become corrupted, and redeeming evil creatures to prevent them from dying evil.