Polybius, Histories

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Interdependency Brings Strength

The result of this power of the several estates for mutual help or harm is a union sufficiently firm for all emergencies, and a constitution than which it is impossible to find a better. For whenever any danger from without compels them to unite and work together, the strength which is developed by the State is so extraordinary, that everything required is unfailingly carried out by the eager rivalry shown by all classes to devote their whole minds to the need of the hour, and to secure that any determination come to should not fail for want of promptitude; while each individual works, privately and publicly alike, for the accomplishment of the business in hand. Accordingly, the peculiar constitution of the State makes it irresistible, and certain of obtaining whatever it determines to attempt. Nay, even when these external alarms are past, and the people are enjoying their good fortune and the fruits of their victories, and, as usually happens, growing corrupted by flattery and idleness, show a tendency to violence and arrogance,—it is in these circumstances, more than ever, that the constitution is seen to possess within itself the power of correcting abuses. For when any one of the three classes becomes puffed up, and manifests an inclination to be contentious and unduly encroaching, the mutual interdependency of all the three, and the possibility of the pretensions of any one being checked and thwarted by the others, must plainly check this tendency: and so the proper equilibrium is maintained by the impulsiveness of the one part being checked by its fear of the other. . . .