Disagree. You're assuming nothing upsets the balance. I'm thinking of the Hammer's Slammers books. For those who haven't read them: a reasonable extrapolation of future tech with one big change: Cartridge-based energy guns. They are lightspeed weapons, no leading your target or the like. Center it in the optics and you'll hit it. The skies are nobody's friend, no aircraft, ballistic weapons are generally not of much use. The only combat rockets are ultra high acceleration short range stuff that's based on getting through before it can be tracked and engaged by the defense mounts. While nukes exist they don't get used because they're just going to be picked off. Against missiles you can make your warheads salvage fuse (messes up the tracking against the next missile), but you can't detect a lightspeed weapon until it hits.