Tolkien saw fit to make geneology an important aspect in many of his storys. There is a diagram of the tribes of the Elves in Silmarillion, and family trees in both The Silmarillion and The Lord of the Rings. The fictional nations in both works did not have an Orctown on the south side of Gondolin or Minas Tirith. Mesceganation between elves and men did play an important role in his storys although it was a very rare occurence, and elves and humans had much more in common than say humans and negros. The Silmarillion and The Lord of the Rings are both deeply racial and that is not at all a negative thing. Aragorn was King of Gondor and Arnor by heritage and birthright, not by popular election with orcs getting to vote. :rofl that was so funny!!  :clink