According to one long-held theory about the origins of South Asia's caste system, Aryans from central Asia invaded South Asia and introduced the caste system as a means of controlling the local populations. The Aryans defined key roles in society, then assigned groups of people to them.
They first appeared in Mesopotamia in 1900 but later they migrated into Egypt in around 1500 BC.
Hebrew was believed to be the soldiers of God.
As Hebrew migrated into Egypt after some period of origination in Mesopotamia hence they are originally from Mesopotamia though they settled themselves in Egypt in around 1500 BC.
During his trip to the United States, Alexis Dd Tocqueville observed that Americans were dangerously close to having a class war, since many people did not have equal rights.