“Last night, she might have wondered what undergrounds apart from the couple she knew of communicated by WASTE system. By sunrise she could legitimately ask what undergrounds didn’t. If miracles were, as Jesus Arrabal had postulated years ago on the beach at Mazatlan, intrusions into this world from another, a kiss of cosmic pool balls, then so must be each of the night’s post horns. For here were God knew how many citizens, deliberately choosing not to communicate by U. S. Mail. It was not an act of treason, nor possibly even of defiance. But it was a calculated withdrawal, from the life of the Republic, from its machinery. Whatever else was being denied them out of hate, indifference to the power of their vote, loopholes, simple ignorance, this withdrawal was their own, un-publicized, private. Since they could not have withdrawn into a vacuum (could they?), there had to exist the separate, silent, unsuspected world.”
–The Crying of Lot 49, Thomas Pynchon.