'Drone warfare (whether by land, sea, or air) is about using disposable machines to kill and injure human beings'

The disposable machines are built by human beings belonging to a nation (or entity) who are interested in self-preservation and protecting the nation. Of course profit doesn't hurt.

Thinks about this. Lately, the rich nations are facing shortage of men willing or able to risk death/injury. The populace lacks the stomach.

And the 'poorer' nations (ones with little to lose) have no qualms about bloodshed as long as they get what they want.

I see drones in warfare as inevitable. How autonomous will they be? Think no one knows for sure at this point...