Bones hardly goes an episode without pointing out how Spock is not human, and that makes him inherently inferior. They are clearly friends, but Bones is casually racist. The striking part is that I do not think a single other member of the crew ever does anything similar with regard to any species.

This alone is a strange and striking aspect of TOS, but in TNG it becomes a pattern. In TNG Spock is replaced by Data, and again the medical doctor of the enterprise is the only character who does not believe that a mechanical being can be alive, conscious, or matter. Every series after Gene Roddenberry's death features doctors with, arguably, bigger roles and who continually show themselves to be the most empathetic and open minded of their crews.

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    But it is not a duplicate of that question.
    – Jonathon
    Oct 18 '16 at 17:56
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    Sometimes question are closed as duplicates not because the question text itself is duplicated, but because the question will solicit the same answer. In this case I believe the answer to this question is "The doctors were racist because that was supposed to be a reflection of the time period (meaning the time that show was produced)", which is the same answer on linked question.
    – Skooba
    Oct 18 '16 at 19:06
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    @Skooba - Indeed. That being said, the question about Pulaski being "racist" (speciesist?) toward Data is somewhat new. If you cropped everything about Bones/Spock out of the question, it wouldn't be a dupe any more.
    – Valorum
    Oct 18 '16 at 19:08
  • @Skooba How so? That would only be the setup before explaining why Gene, or someone else, decided that the doctor of the ship in each series was the best foil for this racist dialogue. I am not asking why Gene, et al, decided to include racism in ST, but why it was almost exclusively racism coming from the main Doctor of the ship (in each series). I would not consider any answer that was at all like the one(s) in the linked question as appropriate or worthy of my vote.
    – Jonathon
    Oct 18 '16 at 19:34
  • @JonathonWisnoski Check out Valorum's comment, there may be a simple edit to get your question reopened. I was merely trying to provide some context as to why those who closed your question did so, as I know it can frustrating at time when feel it was incorrectly.
    – Skooba
    Oct 18 '16 at 19:47