The Cube Men where mechanical creatures created by the Brain Monster of the planet Autan. The Cube Men were powered by the creature's massive brain, but other than following their creators orders the Cube Men appeared to have unique personalities and were completely autonimous. The Cube Men's primary function was to force the Autanians to mine for gold, the only substance their master ate. By 1949, the Autanians refused to mine any more, and so the Cube Men were sent to planet Earth to steal gold. In New Mexico they captured Earthen heroine Sun Girl because she was referred to as the "golden goddess". They brought her to Autan where the Brain Monster intended to use her to collect gold from Earth. However Sun Girl convinced the Brain Monster to allow her to convince the Autanians to once more resume their mining. Sun Girl was sent with a Cube Man named Bokx to talk to the Autanians.
Sun Girl convinced the leader of the Autanians, named Grail, to pretend to once more serve the Brain Monster. This only served to allow Sun Girl to get close enough to use her sun beam on the monster killing it. With the Brain Monster dead, all the Cube Men fell inert.
Type of Government
The Cube Men all loyally serve the Brain Monster.
Level of Technology
The Cube Men likely developed the technology that keeps the Brain Monster alive and built the rocket ship they used to travel to Earth.