QUOTE : Paranoid Systems of History (PSH), a short-lived periodical of the 1920s whose plates have all mysteriously vanished, natch, has even suggested, in more than one editorial, that the whole German Inflation was created deliberately, simply to drive young enthusiasts of the Cybernetic Tradition into Control work: after all, an economy inflating, upward bound as a balloon, its own definition of Earth's surface drifting upward in value, uncontrolled, drifting with the days, the feedback system expected to maintain the value of the mark constant having, humiliatingly, failed. . . . Unity gain around the loop, unity gain, zero change, and hush, that way, forever, these were the secret rhymes of the childhood of the Discipline of Control—secret and terrible, as the scarlet histories say. Diverging oscillations of any kind were nearly the Worst Threat. You could not pump the swings of these playgrounds higher than a certain angle from the vertical.