Steve had learned a lot about the ancient times from the Apollo battleship. The more he understood, the more he felt that the history of human evolution was too short and that humans lacked knowledge about the genetic evolution.
Although there was a systematic evolutionary approach, there were also many deficiencies. An example would be the categorization of F-class weapons.
The weapons that were used by the Original Beings and the weapons that were commonly used were all uniformly categorized as F-class weapons. But, in fact, F-class weapons could be divided into several different classes, with the power of first-class weapons and second-class weapons differing greatly.
For example, Steve's Ghost Hunter's Blade belonged among the second-class weapons, as it was much stronger than ordinary and first-class weapons. Far superior were the weapons that Steve had retrieved from the Apollo battleship, which were mostly fifth-class and sixth-class weapons.