The Arab conquest brought the spread of Arabian culture in Central Asia. And I included Arabic as a language of the country and literature. However, since the 1700's, the authority of Arab governors and military leaders has declined, and linguistic literature other than Arabic started with Saman and Callahan. People other than Arabs changed Muslims to their way of life. Therefore, the decline of Arab's authority in politics does not symbolize the failure of Islam, it represents the transformation of Islam in Central Asia.
Mongolians from Central Asia flowed to Syria through the eastern Muslim centers and finished Hirafa in Baghdad in 1258. Many intruders are adopting Shi'a Muslims and Persian. Over the centuries their descendants ruled Persia and Central Asia and developed Persian culture and art. After Mongol invasion, a new empire appeared. After the establishment of the Ottoman Turks in Istanbul (Constantinople) in 1453, a huge empire continued from the 14th century to the First World War was established. Supporters of Sunni Muslim and Sufism, known for military and architectural achievements. From the 16th century to the 17th century, the Mughal dynasty governed northern India. Here, the prosperous Indian - Muslim culture produced beautiful buildings, paintings and Sophie poetry. Safavid backed Shia in Persia from 1499 to 1722 and encouraged Islamic art and philosophy.
Islamic and Muslim trade networks and Sufism's order spread to sub-Saharan Africa, Central Asia, Malay Islands. Under the Ottoman Empire, Islam spread to southeast europe. In this vast area, as the Prophet Muhammad has appeared in Indian epic and folklore, Muslims are integrated with local culture everywhere. However, conversion to Islam is not abandoning old religious practices abruptly, but instead "assimilating Islamic rituals, cosmology and literature ... into local religious systems". Chinese Muslims from the early immigrants began to adopt the Chinese name and culture, and Nanjing became an important center of Islamic studies.
Since the AD 7th century, Islam has developed into one of the world's major religions. As it spreads through the Middle East to the Sahara desert and to many different societies around Sub-Saharan Africa, Central Asia and the Arabian Sea, it will incorporate some local hiding practices and affect others. Until recently, however, some Muslim countries like Iran have begun to demand that all women wear gauze (in Iran it is called a shawl that covers the whole body). Muslim veil traditional critics believe that women do not choose to wear a veil and are often forced to cover their heads and bodies. By contrast, many daughters of Muslim immigrants in the West symbolize Veleres as devotion and faith and believe that Veil is their own choice. For them, this is a question of religious identity and self expression.