Following the 4th century bc, what became the dominant language in the middle east?

The dominant language in the middle east in the following 4th century BC was Greek. 

The Greek language is classified as a member of a Greek subfamily of the Indo-European languages. In the 4th Century BC, it influences with the expansion of Macedonian conquests of Alexnder the Great. Hordes of people moved from the areas of the modern-day Greece to settlements in the Middle East during the Hellenistic period, bring the Attic language with them that's why Greek is the most common language of the Middle East.

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor