FDR left a handwritten speech in a drawer when he died (to deliver at the UN). He wrote, "If civilization is to survive, we must cultivate the science of human relationships—the ability of all peoples, of all kinds, to live together and work together, in the same world, at peace... The only limit to our realization of tomorrow will be our doubts of today. Let us move forward with strong and active faith."
Beware the leader who bangs the drums of war in order to whip the citizenry into a patriotic fervor, for patriotism is indeed a double-edged sword. It both emboldens the blood just as it narrows the mind. And when the drums of war have reached a fever pitch and the blood boils with hate and the mind has closed the leader will have no need in seizing the rights of the citizenry. Rather, the citizenry, infused with fear and blinded by patriotism, will offer up all of their rights unto the leader and gladly so. How do I know? For this is what I have done. And I am Caesar.