The Creator’s Guidance Is Purposeful
This [purposeful guidance] means that the corrupt [egoistic, natural] conducts in the states of humanity are the very ones that [to the extent of their correction] generate the good [corrected] states. And each good state is nothing but the [ripening] fruit of the work [correction] in the bad state that preceded it. Indeed, these values of good and bad do not refer to the value of the state itself, but [only] to the general purpose: [the state is is not evaluated by itself, rather] each state that brings humanity closer to the goal is considered good, and one that deflects them from the goal is considered bad.
By that standard alone is the "law of development" built—the corruption and the wickedness [egoistic evil] that appear in a [any] state are [also] considered the cause and the generator of the good [perfect] state so that each state lasts just long enough to grow the evil in it to such an extent that the public can no longer bear it. [That is, it depends on the society’s realization of evil, time that can be hastened by explanation, upbringing, and education.] At that time [after realizing evil in itself and resolving to correct it], the public must unite against it, destroy it [the egoistic evil in itself, its relationships], and reorganize in a better state [particularly] for the correction of that generation. [Without trying to skip over any successive periods of development.]
And the new state, too, lasts just as long as the sparks of evil in it ripen and reach such a level that they can no longer be tolerated, at which time it must be [involuntarily] destroyed and a more comfortable state is built in its stead. And so the states clear up one by one and degree by degree until they come to such a corrected state that there will be no sparks of evil. [There will be nothing to correct, and this state will be recognized as final correction.]
– Baal HaSulam, Article, “The Peace”