The creation of earth - Eru Iluvatar
Eru was the supreme god of Arda (the world or earth). He was the single creator, above the Valar (shaped and rule the world), but delegated almost all direct action within Eä to the Ainur, including the shaping of the world. Eru is there forth known as the All-Powerful, he alone could create independent life by using the "Flame Imperishable".
How was the world created?
Eru first created a group of angelic beings, also know as the Ainur. These spirits were also a part of the creation of Arda. The Ainur created the world through a holy music and chanting called the "Music of the Ainur."