“Sovereignty is easily preserved by the very arts by which it was originally created. When, however, energy has given place to indifference, and temperance and justice to passion and arrogance, then as the morals change so changes fortune.”
Sallust
“A great civilization is not conquered from without, until it has destroyed itself from within. The essential causes of Rome's decline lay in her people, her morals, her class struggle, her failing trade, her bureaucratic despotism, her stifling taxes, her consuming wars.”
Will Durant