The Valar withdrew from direct involvement in the affairs of Middle-earth after the defeat of Morgoth, but in later years they sent the wizards or Istari to help in the struggle against Sauron. The most important wizards were Gandalf the Grey and Saruman the White. Gandalf remained true to his mission and proved crucial in the fight against Sauron. Saruman, however, became corrupted and sought to establish himself as a rival to Sauron for absolute power in Middle-earth. Other races involved in the struggle against evil were Dwarves, Ents and most famously Hobbits. The early stages of the conflict are chronicled in The Silmarillion, while the final stages of the struggle to defeat Sauron are told in The Hobbit and in The Lord of the Rings.