Cosmology of Tolkien's legendarium

The cosmology of J. R. R. Tolkien's legendarium combines aspects of Christian theology and metaphysics with pre-modern cosmological concepts in the flat Earth paradigm, along with the modern spherical Earth view of the Solar System. The created world, Eä, includes the planet Arda, corresponding to the Earth. It is created flat, with the dwelling of the godlike Valar at its centre. When this is marred by the evil Vala Melkor, the world is reshaped, losing its perfect symmetry, and the Valar move to Valinor, but the Elves can still sail there from Middle-earth. When Men try to go there, hoping for immortality, Valinor and its continent of Aman are removed from Arda, which is reshaped as a round world. Scholars have compared the implied cosmology with that of Tolkien's religion, Roman Catholicism, and of Medieval poetry such as Pearl or Dante's Paradiso, where there are three parts, Earth, Purgatory or the Earthly Paradise, and Heaven or the Celestial Paradise. Scholars have debated the nature of evil in Middle-earth, arguing whether it is the absence of good – the Boethian position, or equally as powerful as good – the Manichaean view. Eru is introduced in The Silmarillion as the supreme being of the universe, creator of all existence, including the world, Arda, and its central continent, Middle-earth. In Tolkien's invented Elvish language Quenya, Eru means "The One", or "He that is Alone" and Ilúvatar signifies "Allfather". Eru first created a group of godlike or angelic beings, the Ainur, consisting of the powerful Valar and their assistants, the Maiar. These assisted in the creation of the universe through a holy music and chanting called the Ainulindalë or "Music of the Ainur". The "Flame Imperishable" or "Secret Fire" represents the Holy Spirit in Christian theology, the creative activity of Eru, inseparable both from him and from his creation. In the interpretation of Christopher Tolkien, it represents "the mystery of authorship", the author both standing outside of his work and indwelling in it.