There is no doubt that "The Silmarillion" is the most serious work of John Ronald Reuel Tolkien. This book is not a mere fairy tale, but a collection of myths comparable to such world literature masterpieces as "Illyad" or "Oddessy" by Homer or The Younger or Elder Edda.
In "The Silmarillion" Tolkien told us about the creation of his world and its history; how the evil was born and how it was fought... It is a Bible, created by the genius writer's imagination...