Galactic civilizations may or may not exist. If galactic civilizations exist they are communities of Intelligent aliens. Any alien civilization that we encounter will almost certainly be incalculably far in advance of us technologically and may consist of machine intelligence.
Galactic civilizations are classified into three types:
- Type 1 Civilizations have harnessed and controlled the resources of a whole planet. We are currently moving towards a Type 1 Civilization.
- Type 2 Civilizations have harnessed and controlled the resources of a one or more planetary systems and derive their energy from one or more stars. The Original Star Trek Series featuring James T. Kirk is an example of this.
- Type 3 Civilizations have harnessed and controlled the resources of a whole galaxy or a large part of it. the Galactic Empire of Star Wars, the United Federation of Planets, the Dominion, and the Borg of Star Trek are examples of this.
- ↑ In the opinion of Michio Kaku