The "Prime Directive" is a fundamental principle in the fictional universe of Star Trek. It prohibits members of the United Federation of Planets from interfering with the internal development of alien civilizations, particularly those that are less technologically advanced. This directive aims to protect the natural evolution of societies and prevent the imposition of external values or technologies. In practice, the Prime Directive often creates moral dilemmas for Starfleet officers, who must balance their duty to uphold this principle with their desire to help those in need. The directive emphasizes respect for cultural diversity and the importance of allowing civilizations to progress on their own terms.