In a world with other intelligent and cultured races, Men on Middle-earth interact with each other and with the other races in a complex history, narrated mainly in The Silmarillion. Men are in general friendly with the other free peoples, especially Elves; they are implacable enemies of the enslaved peoples, especially Orcs. In the First Age, Men, the Edain, lived in Beleriand on the extreme West of Middle-earth. They form an alliance with the Elves and join a disastrous war against the first Dark Lord, Morgoth. The creator, Eru Iluvatar, eventually destroys Beleriand and Morgoth's fortress, resulting in the reshaping of the world, which becomes round; as a reward for fighting Morgoth, the Edain are given the new island of Númenor as their home.