Spock is the first or only Vulcan in Starfleet. The crew of the Intrepid would like a word.

These can be tough, since three generations of fans have worked on later shows or ancillary official materials. E.g. Startrek.com used to say that about Spock.

Lots about Klingon history: they stole warp tech from the hurq, the hurq (who came after Kahless and stole his relics) are the gods of ancient Klingon myth. Klingon warrior culture is a recent aberration (claims one lawyer whose parents were undervalued academics). Kahless lived a thousand years before TNG. That’s half the time since Surak or Charlemagne.