Monarchy degenerates into tyranny, aristocracy into oligarchy, and democracy into savage violence and chaos.
PolybiusFor peace, with justice and honor, is the fairest and most profitable of possessions, but with disgrace and shameful cowardice, it is the most infamous and harmful of all.
PolybiusThat historians should give their own country a break, I grant you; but not so as to state things contrary to fact. For there are plenty of mistakes made by writers out of ignorance, and which any man finds it difficult to avoid. But if we knowingly write what is false, whether for the sake of our country or our friends or just to be pleasant, what difference is there between us and hack writers? Readers should be very attentive to and critical of historians, and they in turn should be constantly on their guard.
PolybiusIn our own time the whole of Greece has been subject to a low birth rate and a general decrease of the population, owing to which cities have become deserted and the land has ceased to yield fruit, although there have neither been continuous wars nor epidemics...For as men had fallen into such a state of pretentiousness, avarice, and indolence that they did not wish to marry, or if they married to rear the children born to them, or at most as a rule but one or two of them, so as to leave these in affluence and bring them up to waste their substance, the evil rapidly and insensibly grew.
Polybius