Dr Saab, dynasties that do not evolve are destined for extinction. Kingship, priesthood and the rich all play their part in keeping the majority down, usually by giving them rituals to worship a false god, obey the king, or brainwashing them into thinking that the rich give jobs to slaves etc. so they must be served.
There is diversity in mankind, this is a good thing, but respectfully, the Zoroastrians had their time and they now have little to offer humanity except re-lighting a flame that extinguished long ago before Umar blew away their decaying way of life.
There are very good humanitarian Parsis, every people, culture, religion has them, but life and progress comes from following only what the True God has given us as Guidance.