They are not the dominant specie of the planet anymore because the enemy that has landed in their world is far more superior. In order to survive, they need a hero who can save them and resultantly save humanity as well. For a long time, the enemy was stopped by a spell known as Forbidding but that spell is also breaking which means that sooner or later the demons will return to the human world.
If the one they call the Chosen will not appear in time then everything will be over sooner than expected. So all human beings can do now is to wait and expect good things from their upcoming future because there is nothing else they can do about it.