"The chicken(Persian/Aryan colour caste oppression) or the egg(semetic chosenism)?"
I guess it depends on who came first in history, Persians/Aryans or Semites.
There has to be an origin of that type of mindset. The persian/aryan and semite must have seen the benefit of adopting such behavior and deemed it as valuable and desireable.
The question is where did they learn that behavior or is it their natural state of being ...corruption?
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