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Being left behind sits poorly with the descendants of a Persian civilization responsible for much of the Golden Age, the strides in medicine, astronomy and mathematics that piled up while Europe was mired in the Dark Ages. And will be sure to let you know that Persians were inventing things long before the arrival, an import carried there in 637 AD by invading Arabs, a desert people the plateau-dwelling Persians always thought of themselves as above, and not only topographically.
