Cycle of Revolutionary Decay?

In times of great national oppression and revolt, when the heated passions of men are inflamed to fever heat, dark dwellers of the depths are drawn up to earth's surface by the force of kindred desires, exciting and urging on revolutions, which, begun at first, from motives that were high and pure and noble, will under the stress of passion and the instigation of these dark beings from the lower sphere become at last mere excuses for wild butcheries and excesses of every kind. 

By these very excesses, a reaction is created, and these dark demons, and those whom they control, are in their turn swept away by the higher powers, leaving a wide track of ruin and suffering to mark where they have been. 

Thus, in these lowest hells, a rich harvest is reaped of unhappy souls who have been drawn down along with the evil spirits that have tempted them.