" How could a republic resist, for all time, every cause which undermines its freedom? How could it always contain the ambition of the would-be princes which it also nourishes? How could it withstand for long the seductions of the usurper, the practical deaf person, and the corruption of its members, as long as self-interest will be all-powerful in men? How can it hope to always win, or even leave with honour, every war which it will have to support? How will it be able to prevent these annoying economic situations that come with its freedom, these moments critical and decisive - these and other chances from which arise both the courageous ones and the corrupt? If the troops are ordered by loose and timid heads, it will become the prey of its enemies; and if they have as the head of their soldiers men that are vigorous and bold, these same men, after having been vital in the war, will be dangerous in peace. "

― Frederick the Great ,