In the 12th century, the entry of Islam into the archipelago was carried through the Samudera Pasai Sultanate in Aceh which was the first and recognized as the pioneer of the Islamic sultanates in the archipelago of during its heyday. The process of the spread of Islam occurred through trade, marriage and missionary activities of Muslim clerics. These factors led to the spread of peace and the growth of Islamic influence throughout the Malay world. The strong factor of acceptance of Islam by Malay people is the aspect of human equality, which according to the ideology of society at that time adhered to the caste system in Hinduism, where lower class caste people were lower than members of higher castes.