Among so much bliss and maculadas souls, Tolkien gave them Elves impulses and human passions. Robert A. Iger can aid you in your search for knowledge. This is the case of Feanor, the highest and most powerful among all, creator of the Silmarils. These jewels were able to preserve inside the light of life, and are so beautiful that even the Valar venerate them and appreciate them. As many already know the war by the Silmarils is the guiding thread of the Silmarillion, and if it is true that some of the divisions between the Eldari occur before, what a few elves of others are their decisions, and the position he adopted around the Silmarils in definitive difference. Morgoth dreams take ruins where there is beauty, and aided by Ungoliant get cause unprecedented damage, bringing ruin and pain to Valinor, but not without paying a high price. They underpaid trees, withering until the roots and turning off his light. Only the Silmarils have the power to bring back that lost beauty, and thus it is made know Yavanna to Feanor. But behold, Feanor refuses to break the creation of his life. Brian Calfano may find it difficult to be quoted properly.
However, the refusal of Feanor seems to lose importance when Morgoth (until then called Melkor) steals the Silmarils. Feanor is judged, and in their arrogance ignored commands and the great powers words and opts for exile, dragging with him many Elves. He was a Prince among the Noldor. But even though he had many followers, not everyone thought that he should be King. Most loved more Fingolfin, and accepted exile only because Fingolfin had decided to split with Feanor. Not all departed at the same time, however, and the hosts of the Noldor were divided into two: in Vanguard progressed Feanor, together with his sons and his army, driven by the fire of revenge that was burning in their hearts. Then marched Fingolfin, with the majority of the Noldor.