No real people of faith in the story. Seems odd. World wide events happening in unison. So I'm going with the Book of Revelations theory. Christians have been "called away". Earth and unsaved people left behind with the devils and demons (like Ink). I was listening to Black Sabbath today, so I may have been influenced.

Also last scene of the series will be only Datu left alive still trying to fix that damn windmill.