rounser said:
Real world evolution beat you to the punch, Alan. Humans are "advanced" chimps - the third chimpanzee, if you will.
On Dragon Earth halflings and goblins are even more closely related. The former being practically siblings of chimps, and goblins half-siblings. This making humans the fifth chimpanzee.
This would make orcs the sixth chimpanzee, elves the seventh, and dwarfs the eighth. Though dwarfs for some reason tend to be creationists, and thus more than a bit touchy about the subject. (Never get between a dwarf and a dragon discussing evolution.)