A cargo cult is a religious movement usually emerging in tribal or isolated societies after they have had an encounter with an external and technologically advanced society. Usually cargo cults focus on magical thinking and a variety of intricate rituals designed to obtain the material wealth of the advanced culture they encountered.
The term "cargo cult" has caught the imagination of the public and is now used to describe a wide variety of phenomena that involve imitating external properties without the substance. In commerce, for example, successful products often result in "copycat" products that imitate the form but are usually of inferior quality.
Cargo cults exemplify the third law of Arthur C. Clarke: that any sufficiently advanced technology is indistinguishable from magic.