The Lord of the Rings presents an incredibly dark view of humanity
Frodo is for all intents and purposes the nicest guy in the world and has a pure heart and great strength of character. The world is falling apart around him, and he need only toss the ring into the Cracks of Doom to end the evil and the war, and to be hailed a hero.
And yet even he couldn't do it. And if he couldn't do it, what does that say about the rest of us? We see him as the hero of the story...and of course he is...but his failure at this critical moment is quite poignant though often overlooked. (And stands in contrast to other epic heroes valued by society - Luke Skywalker never exhibits such a moral lapse).
I've heard that Gollum's accidental fall into the Cracks with the ring can be understood as the intercession of the grace of God (in the Christian and specifically Catholic sense). And I suppose that is the point of Tolkien, who was Catholic. That all humans (if you take a hobbit to be an extension of humanity) are not without original sin, and everyone needs God to achieve being a good person. #entertainment