Aquila is correct.
Startrek was very much a political message for Rodenberry.
Almost every episode had some subtle poltical or humanirian tone.
He especially loved to denounce relgion as an old and archaic idea.
And let me tell you, Klingons and russians are a LOT alike
Hairy Burly people that love to get drunk and fight!
(take it from me, my family is russian)