The homogenous casting also has some unfortunate implications with regard to Stargate’s pre-Darwinian take on evolution, where every being changes for the better until Ascension. According to this, lower life forms turn into modern humans, modern humans turn into superpowered psychics, and superpowered psychics turn into godlike Ascended beings. This is a set pattern that happened before ages ago with the Ancients and can be seen happening at the time of the show. So, it’s unfortunate that all of these superior forms into which beings evolve happen to be white. Oops.
Unlike Star Trek with its aim to present a multi-cultural image through having a diverse cast, the early seasons of Stargate SG-1 do not represent a multi-cultural format. In fact, the only substantial role given to a nonwhite actor who is part of Stargate Command in the early episodes is that of the alien, Teal'c. Other nonwhite actors appear occasionally but function mostly as background to the central narrative. When nonwhiteness is made visible it is done so in terms of alien representation. Hostile aliens in the series are predominantly nonwhite, and often black.