In Robert Heinlein's Future History, the World Federation Space Patrol keeps the peace by monopolizing orbiting nuclear warheads. A hero of the Patrol prevents a coup by some of his colleagues who would have used the weapons to intervene in Terrestrial affairs. The Patrol does not intervene in the Second American Revolution, regarding it as a local issue.
In Larry Niven's Known Space history, the UN, governing Earth and Moon although not the Belt, suppresses any technology that might have military applications.
In Jerry Pournelle's CoDominium History, Earth's main export seems to be warfare.
In Isaac Asimov's Galactic Empire History, when it is suggested that Earth might have been made radioactive as an act of war, it is pointed out that the only Space Admiral who ever suggested doing such a thing was lynched by his own men.
In Poul Anderson's Tales Of The Flying Mountains (New York, 1984), the Advisory Council of the spaceship Astra discusses what to teach children in the ship:
"'If we've told them about the wonderful space rockets, and nothing about the nuclear warheads that most of those rockets were meant to deliver - in effect, we'll have lied to them, and they'll find that out and distrust everything else we've tried to teach them.'" (p. 17)