The more mixed and less progressive Indigo peoples east of the Sahara plateau migrated to Arabia, and then from there to Mesopotamia, India, and Ceylon. 
The Melchizedek teachings of the one God became established in the Arabian Desert at a comparatively recent date. As in Greece, so in Arabia the Salem missionaries failed because of their misunderstanding of Machiventa’s instructions regarding overorganization.  The serpent always has been revered in Arabia. 
The brilliant culture of the Nile was cut short by internal warfare and invasions by inferior tribes from Arabia. As a result, social progress of Egipt steadily declined for more than 500 years. 
See also: UB 64:7.1.