The caste system practiced by Europeans upon other Europeans is called feudalism. The caste system practiced by Europeans upon Nubians is titled racism. The purpose of the caste system racism is to systematically and institutionally relegate Nubians to the lowest class or order of persons within the system for exploitation in addition to an always available supply of cheap labor. This caste system is maintained by way of its institutions (court, education, law enforcement, medicine, etc.) in addition to attitudes and perceptions inculcated into others. The purpose of just such a caste system is to create a permanent servile class for purposes of serving commercial and political interests.