Heart of the Assassin

Civilizations do not fall because of the barbarians at the gates. Nor does a great city fall from the death wish of bored and morally bankrupt stewards presumably sworn to its defense. Civilizations fall only because each citizen of the city comes to accept that nothing can be done to rally and rebuild broken walls; that ground lost may never be recovered; and that greatness lived in our grandparents but not our grandchildren. Yes, our betters tell us these things daily. But that doesn't mean we have to believe it.

– BILL WHITTLE, "THE UNDEFENDED CITY"