Thread:Bobbybuck/@comment-996391-20141212101631/@comment-2041242-20141212111900

The reason we do not use the category Alien is simple:

Asgardians are aliens to humans, but humans are aliens to asgardians.

Kree are aliens to humans, humans to kree.

Etc etc.

If we added Aliens as category, all the humans should get it as well, because in the eyes of other races, humans are aliens