"In a hole in the ground there lived a hobbit."
Tolkien's plans with respect to the MiddleEarth universe he created in both the Hobbit and the Lord of the Rings weren't so easy to codify.
Coming together at Rivendell, our hobbit hero and his friends meet with representatives from many of the world's free races, to discuss and decide on the fate of the Ring.
R. Tolkien's, The Hobbit, is perhaps unique in literature.
It is easy to suspect that it was planned that way, that The Hobbit was meant to develop an audience that would be grown up when the larger, denser work was ready for their consumption.