There are a few people in the 'kin community who claim they're here for the sake of bringing enlightenment to humankind, or to save the Earth. (Somewhat like Starseeds claim?)

What exactly 'saving the Earth' consists of varies: Some people believe that the Earth used to be more magically awake, and that by being more magically active themselves, they can consciously re-awaken the magic-of-here.

Some people believe humanity needs a swift kick in the ass (which these people, one assumes, consider themselves capable of providing), and who better to do it than elves and other non-humans?

Some people, including a number of elves and fae, combine the two previous views. They feel it is necessary to awaken people to the possibilities of magic, and that in turn will reawaken the magic-of-here. (see GlamourBombing? )

Some people apparently believe that 'kin and humanity will come to some great spiritual war, in which 'kin will bring about some magical Utopia by ridding the world of 'mundanes'.

(Some people need a swift kick in the ass themselves.)

Discussions about 'saving the Earth' are frequently fraught with overblown egos, hysteria, and delusion. You'll find that the more rational perspectives on this issue are more along the lines of individual change and growth, and the affect that doing things on a small scale has on the overall picture. Individuals who think along these lines may subscribe to the idea that everything one does has a ripple effect on the world around one.