U.S. Dominance of Outer Space would Prevent Hegemonic Power Struggle
Seizing the initiative and securing low-Earth orbit now, while the US is unchallenged in space, would do much to stabilize the international system and prevent an arms race is space. From low-Earth orbit (LEO), the enhanced ability to deny any attempt by another nation to place military assets in space, or to readily engage and destroy terrestrial ASAT capacity, makes the possibility of large scale space war and or military space races less likely, not more. Why would a state expend the effort to compete in space with a superpower that has the extraordinary advantage of holding securely the highest ground at the top of the gravity well? So long as the controlling state demonstrates a capacity and a will to use force to defend its position, in effect expending a small amount of violence as needed to prevent a greater conflagration in the future, the likelihood of a future war in space is remote. Moreover, if the US were willing to deploy and use a military space force that maintained effective control of space, and did so in a way that was perceived as tough, non-arbitrary, and efficient, such an action would serve to discourage competing states from fielding opposing systems. Should the US use its advantage to police the heavens (assuming the entire cost on its own), and allow unhindered peaceful use of space by any and all nations for economic and scientific development, over time its control of LEO could be viewed as a global asset and a public good. Much in the manner that the British maintained control of the high seas, enforcing international norms of innocent passage and property rights , the US could prepare outer space for a long-overdue burst of economic expansion.
Dolman, Everett C. "US Military Transformation and Weapons in Space." E-Parliament Conference on Space Security. Washington, D.C.: , September 14, 2005. [ 4 quotes ]