Assuming the role of the librarian (an not to stray off 'monsters' one time too many, so placing my head under closer inspection by mentioned principals), I suggest to your consideration following old, but worthy discussions:
Of Evil, Free will, and Fate (from 'Gollum') (thread author -
Legolas)
The role of Fate in ME (thread author -
Mithadan)
immortality (thread author -
Matthew2754)
The Downfall of Numenor (thread author -
Mithadan)
Frodo or the Ring (thread author -
Mithadan)
Orcish fëar (thread author -
HerenIstarion)
Already mentioned
Evil Things (thread author -
Nirvana II)
also
All About Orks article may come in useful (having its origins in Orcish Fëar thread, but in a somewhat more refined, final, form)
There
are loads of other threads dealing with the subject, I'm sure, I just can't remember them all
regards