Abu Hamed Mohammad ibn Mohammad al-Ghazzali, known as Algazel to the western medieval world, born and died in Tus, in the Khorasan province of Persia (modern day Iran) was a Persian Muslim theologian, jurist, philosopher, and mystic.
Ghazali has sometimes been referred to by historians as the single most influential Muslim after the Islamic prophet Muhammad. Others have cited his movement from science to faith as a detriment to Islamic scientific progress. Besides his work that successfully changed the course of Islamic philosophy—the early Islamic Neoplatonism developed on the grounds of Hellenistic philosophy, for example, was so successfully refuted by Ghazali that it never recovered—he also brought the orthodox Islam of his time in close contact with Sufism. The orthodox theologians still went their own way, and so did the mystics, but both developed a sense of mutual appreciation which ensured that no sweeping condemnation could be made by one for the practices of the other.
Al-Ghazali was born in 1058 in Tus, a city in Khorasan province of Persia (Iran). His father, a traditional sufi, died when he and his younger brother, Ahmad Ghazali, were still young. One of their father's friends took care of them for the next few years. Later in 1070, Ghazali and his brother went to Gurgan to get enrolled in a madrassah. There, he studied fiqh (islamic jurisprudence) next to Ahmad ibn Muhammad Radkani and Abu'l Qasim Jurjani. After approximately 7 years of studying, he returned to Tus.
His first important trip to Nishapur occurred around 1080 when he was almost 23 years old. He became the student of the famous Muslim scholar Abu'l Ma'ali Juwayni, known as Imam al-Haramayn. After the death of Al-Juwayni in 1085, Al-Ghazali was invited to go to the court of Nizamul Mulk Tusi, the powerful vizier of the Seljuq sultans. The vizier was so impressed by Al-Ghazali's scholarship that in 1091 he appointed him as chief professor in the Nizamiyya of Baghdad. He used to lecture to more than 300 students, and his participations in Islamic debates and discussions made him popular in all over the Islamic territories.
He passed through a spiritual crisis in 1095 and abandoned his career and left Baghdad on the pretext of going on pilgrimage to Mecca. Making arrangements for his family, he disposed of his wealth and adopted the life of a poor Sufi. After some time in Damascus and Jerusalem, with a visit to Medina and Mecca in 1096, he settled in Tus to spend the next several years in seclusion. He ended his seclusion for a short lecturing period at the Nizamiyyah of Nishapur in 1106. Later he returned to Tus where he remained until his death in December, 1111. He had one son named Abdu'l Rahman Allam.
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