War

"War... War never changes.
Since the dawn of humankind, when our ancestors first discovered the killing power of rock and bone, blood has been spilled in the name of everything: from God, to justice, to simple, psychotic rage.
In the year 2077, after millennia of armed conflict, the destructive nature of man could sustain itself no longer. The world was plunged into an abyss of nuclear fire and radiation.
But it was not, as some had predicted, the end of the world. Instead, the apocalypse was simply the prologue to another bloody chapter of human history.
For man had succeeded in destroying the world... but war... war never changes." 

- Opening Cinematic from Fallout 3

There is no winner in war. Everyone believes they are the hero in their story and will backwards justify any outcome...but in reality, we always lose precious progress on the whole. We must eliminate war from existence.
Although Eisenhower was involved in creating the Military Industrial Complex, he recognized his folly and later said:

"Every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed.
This world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children."