An invention solely for military purposes? Sorry but I have to say no.
>Why cannot it be invented in this positive context in the first place then. I can imagine the reason is money and in that sense it just shows how screwed up our world is.
Animals - libido.
Humans - libido plus ability to kill at will (mortido is partial, very incomplete, identification of that fundamental driver) .
Super-humans - libido plus ability to kill at will (highly developed and extremely self-controlled, necessary to avoid the fate of Neanderthals who lost to the much more violent and better at weapons development species - Cro-Magnon) plus the ability you're talking about - the ability to invent, more generally - create in the positive context, ie. "creatido". Creation for the sake of creation, exploration, ...
A few humans through the history have manifested the basic elementary "creatido" thus providing us with the glimpse into the future human species which would evolve from [and will overtake because peaceful co-existence with bloody Cro-Magnon is just impossible ] ours species.
wouldnt drive without it. it is astonishing how many americans are so dependent on their navigation system
At its best, the military serves to protect citizens from foreign threats. Like with police, some people are bad and sometimes we have to kill them to defend the good people.
In the hands of the ideal military, technology can serve to lessen civilian casualties, save troops' lives, avoid using troops at all, or act as a deterrent. And yes, we're all aware that no military is ideal.
Ensure your military -- and police -- stick as closely as possible to their strict and just duty... any power can and will be abused. But it strikes me as naive to react against military as an abstract concept. The ostensible goal of protecting a free nation hardly seems ignoble.