The primary governments of planets throughout the galaxy have varied through time. Each planet, or system of planets, has its own unique history of government. The non-Human species in the galaxy also have unique histories of government. The more widespread species having both planetary and species level governmental organization.
The focus of this section is on Human governments.
The history of Human government has always included planet or system level governments, with a more varied history of interplanetary government. Initially planetary governments were the primary governing bodies, held together through an alliance of planets referred to as the Colonial Alliance. It consisted of an Ambassadors Council with two representatives from each of the Human colonies. The primary governance fell to each individual colony.