Anti-Arabism is a major element of movements known as Berberism that are widespread mainly amongst Algerians of Kabyle and other Berber origin. It has historic roots as Arabs are seen as invaders that occupied Algeria and destroyed its late Roman and early medieval civilization that was considered an integral part of the West; this invasion is considered to have been the source of the resettlement of Algeria's Berber population in Kabylie and other mountainous areas. Regardless, the Kabyles and other Berbers have managed to preserve their culture and achieve higher standards of living and education when compared to Algerian Arabs. Furthermore, many Berbers speak their language and French; are non religious, secular, or Evangelical Christian; and openly identify with the Western World. Many Berber Nationalists view Arabs as a hostile people intent on eradicating their own culture and nation. Berber social norms restrict marriage to someone of Arab ethnicity, although it is permitted to marry someone from other ethnic groups.