Why is giving up the arkenstone a noble act?

Giving up the Arkenstone is a noble act because it represents selflessness and the greater good over personal desire. Thorin Oakenshield's obsession with the gem risks conflict and greed among allies, threatening the peace of Middle-earth. By relinquishing it, Bilbo Baggins prioritizes harmony and unity, demonstrating courage and wisdom in the face of potential discord. This act highlights themes of sacrifice and the importance of community over individual gain.