The prospects of a secure homeland afforded by space-based defense, combined with the overwhelming offensive potential afforded by the pervasive and immediate application of force from space, represents the ultimate high ground. Any country that achieves space weaponization will readily become a preeminent military power. Over the long term, space weapons may be the best -- and in some cases, only -- means to meet important national security needs. The military applications and national security needs best fulfilled from space include defense of the homeland against foreign ballistic missile threats, defense of national space assets, and future terrestrial offensives -- specifically in pursuit of time-critical targets.

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Deblois, Bruce M. "The Advent of Space Weapons." Astropolitics. Vol. 1, No. 1 (Summer 2003). [ 15 quotes ]