Colossians 2:10 And you have been made full in Him, who is the Head of all rule and authority. Ephesians 6:12 For our wrestling is not against blood and flesh but against the rulers, against the authorities, against the world-rulers of this darkness, against the spiritual forces of evil in the heavenlies.
In 2:10 Paul says that Christ is the Head of all rule and authority. The rule and authority spoken of here are the angelic powers, in particular the fallen angels who still occupy positions of power. According to the full revelation of the Bible, after God created the universe, He placed it under the control of an archangel and other leading angels.
When this archangel rebelled against God and became Satan, many of the leading angels who assisted him in ruling the universe became the evil rulers and authorities in the heavenlies. These are described in Ephesians 6:12 as the rulers, the authorities, the world-rulers of this darkness, the spiritual forces of evil in the heavenlies.
These angelic powers rule over the nations. For this reason, in the book of Daniel there is mention both of the prince of Greece and of the prince of Persia. (A prince here denotes one of the angelic powers or rulers.).
This means that all the nations on earth today are under the rule of authorities in the heavenlies; however, not all of these are evil. But Christ is the Head of all rule and authority. Since Christ is our perfection and completion, we do not need other rules and authorities as objects of adoration, for He is the Head of all these.