Late in Steven Spielberg’s new film, Disclosure Day , a former nun-to-be calls the abbess of the convent she left behind. The world is about to learn that aliens have been living on Earth for decades. Although Jane, the onetime novitiate, is no longer religious, she still thinks that the idea of God is what “keeps whole civilizations together.” She’s worried that when people find out that humans aren’t the only intelligent beings in the universe, they’ll lose their faith, and society will