[The Saucepan Man]

Originally Posted by rutslegolas

But why would there be a second kin-strife

Assuming, as seems likely, that Denethor would wish to wield the Ring against Sauron himself while he remained Steward, then Boromir's refusal to give it up would create a serious rift between them. Add to that the corrupting influence of the Ring (on both its bearer and those within its vicinity), which would have an interest in creating a schism within Gondor, then we surely have the basis for a possible civil war. Some would remain loyal to Denethor, while others would rally to Boromir. Inevitably Faramir would be drawn in, even though he might be able to resist the Ring's wiles himself. I'm not saying that this would inevitably lead to a second kin-strife, but its certainly a distinct possibility. The Ring would do its utmost to create instability within Minas Tirith and Gondor so as to make it easier for its Master to reclaim it.

Originally Posted by rutslegolas

I think he could even have the power to defeat the Dark Lord himself

There is a quote in Tolkien's Letters (which, unforunately I do not have to hand) which suggests that, with the possible exception of Saruman, only Gandalf might be expected to prevail over Sauron by use of the Ring. Tolkien makes it clear that Aragorn would not have been able to do so and indicates that even Galadriel was probably fooling herself (under the Ring's influence) when she contemplated successfully using it against Sauron. In light of this, I am certain that Boromir, even with the Ring, would be no match for Sauron. Possibly, his armies could hold out for a while against Sauron's forces but I am sure that Sauron would prevail in the end. Remember, the Ring is tricksy and its primary intent is to return to its Master.