About the Seers
The Seers are a group of exalted angelsin power, more like demi-godswho act as a sort of holy magic 8-ball. They predict the future, or rather, they decide the future... and they have decided that the future of the Earth is to be destroyed. God has lost His tenuous grasp on sanity and has lost faith in His creations and Himself.
Seers do not need to live on the Earth; they move between Heaven and Earth at will.