The Nature of the Ring and Corruption
The Lord of the RingsThe One Ring's corrupting influence on all who possess or desire it.
increasing
Bearing strength in each event
decreasing
The Ring's Effect on Isildur

The Ring's Effect on Isildur
The Failure to Destroy the Ring
Isildur takes the Ring as a weregild, refusing to destroy it. The Ring begins to corrupt him.
The Betrayal of the Ring
The Ring slips from Isildur's finger, leading to his death in the Gladden Fields. The Ring is lost.
The Legacy of Failure
Isildur's failure to destroy the Ring sets the stage for the Third Age conflict.
The Corruption of Gollum

The Corruption of Gollum
The Murder of Déagol
Sméagol kills his friend for the Ring. The Ring immediately corrupts him, turning him into a monster.
The Long Years of Obsession
Gollum becomes a slave to the Ring, unable to think of anything else. His body and mind are twisted.
The Inability to Let Go
Even after losing the Ring, Gollum is consumed by desire. He will do anything to get it back.
The Temptation of Boromir and Others

The Temptation of Boromir and Others
Boromir's Fall
Boromir is a good man but succumbs to the Ring's promise of power. He tries to take it from Frodo.
The Resistance of Galadriel
Galadriel is tempted but rejects the Ring. She understands its danger.
The Final Triumph of Frodo
Frodo, despite being corrupted at the end, is saved by the Ring's destruction. The Ring's power is broken.
S.A. 3441, after the Last Alliance
T.A. 2463 onward
T.A. 3018–3019