The Tolkien Universe refers to the expansive fantasy world created by J.R.R. Tolkien, primarily set in Middle-earth and encompassing the stories told in The Hobbit, The Lord of the Rings, and The Silmarillion. It is a richly detailed mythos with its own history, languages, and lore, centering on themes of heroism, friendship, the corrupting influence of power, and the enduring struggle between good and evil.