for the record----it is true that the people who INVENTED the idea of "race" to wit, ANTHROPOLOGISTS, classified arabs as "caucasian"Arabs are white.
By the time of Adam and Eve Sumer had a written language, agriculture and irrigation and sailboats.
However, since arabs aka ISHMAELITES as described
in ancient literature were the classical slave traders---
in "slaves" of subsaharan origin ----they is VERY
MIXED "racially" and tend to be what the brits
call "brown". The Sumerians were not arabs or
Ishmaelites. The phrase ..."by the time of adam and
eve..." has no meaning. Racial distinctions in humans -----AIN'T REAL BIOLOGY