Flaws in Lord of the Rings... Yes in the book.

[Nilpaurion Felagund]

His idea is not that power corrupts, but that evil corrupts and delights in corrupting good...

The Ring, aside from its inherent evil, gives unnatural might. For someone in Arda to acquire more power than that is delegated to him is extremely dangerous. Case in point:

...especially that they[the Valar] had attempted to guard and seclude the Eldar by their might and glory fully revealed...

(UT IV 2)

The Ring's greatest evil is that it promises a swift display of might to amend wrongs and enforce order. It allows a shortcut way to good, an easier way to achieve what is necessary. The battle of good against good* is always harder to fight than one of good against evil.

But then, use of force to implement good has never been feasible. If it was, we should be polishing up on our Marx now...

Later days!
->Elenrod

<font size="1">*with credits to Philip Yancey, The Jesus I Never Knew</font>