As we have seen, the various races portrayed in Middle-Earth each demonstrate very specific invariable characteristics. Where do humans fit in among the other races of Middle-Earth? Are humans a “good” race ?
The main defining characteristic of humans is that they are free to shape their own destinies beyond what is set out in the Music of the Ainur, and humans are unique in that they are the only species in Middle-earth that has this freedom:
Naturally this means that humans are also free to be good or evil, but, as Iluvatar says of those who fall into evil, "these too in their time shall find that all that they do redounds at the end only to the glory of my work".
This freedom is also the cause of human mortality, which is discussed later in the same chapter, although the reason why mortality needs to be a consequence of it is not given.