Laudator Temporis Acti

Thucydides (tr. Benjamin Jowett):

3.82.8:

For the leaders on either side used specious names, the one party professing to uphold the constitutional equality of the many, the other the wisdom of an aristocracy, while they made the public interests, to which in name they were devoted, in reality their prize. Striving in every way to overcome each other, they committed the most monstrous crimes; yet even these were surpassed by the magnitude of their revenges which they pursued to the very utmost, neither party observing any definite limits either of justice or public expediency, but both alike making the caprice of the moment their law. Either by the help of an unrighteous sentence, or grasping power with the strong hand, they were eager to satiate the impatience of party-spirit. Neither faction cared for religion; but any fair pretence which succeeded in effecting some odious purpose was greatly lauded. And the citizens who were of neither party fell a prey to both.

3.83.1:

An attitude of perfidious antagonism everywhere prevailed; for there was no word binding enough, nor oath terrible enough to reconcile enemies. Each man was strong only in the conviction that nothing was secure; he must look to his own safety, and could not afford to trust others. Inferior intellects generally succeeded best.