QUOTE : What was happily proved by this early revolution is something that we perhaps need to be reminded of again today: that neither exact science nor engineering is proof against the irrationality of those that operate the system. Above all, that the strongest and most efficient of megamachines can be overthrown, that human errors are not immortal. The collapse of the Pyramid Age proved that the megamachine exists on a basis of human beliefs, which may crumble, of human decisions, which may prove fallible, and human consent, which, when the magic becomes discredited, may be withheld. The human parts that composed the megamachine were by nature mechanically imperfect: never wholly reliable. Until real machines of wood and metal could be manufactured in sufficient quantity to take the place of most of the human components, the megamachine would remain vulnerable.