So it was not surprising that he was drawn to a tall, solitary classmate named Sayyid Imam al-Sharif.

NEWYORKER: The Rebellion Within

In the 1950s, the famous Muslim Brotherhood philosopher, Sayyid Qutb, began to write about the concept of Islamic economics.

CENTERFORSECURITYPOLICY: Center For Security Policy

Among the individuals to pull out was Mustapha Gamel Al Sayyid, Professor of Political Science at Cairo University and the American University in Cairo.

CNN: Row over Egypt's new constitution reflects wider tensions

Beginning with the Muslim Brotherhood of Hassan el-Banna in 1928, followed by the movements founded by Islamist ideologues like Abul ala Maududi, Sayyid Qutb and the extremist Deobandi creed in South Asia, radical Islam established a strong presence in the Muslim world in the second half of the 20th century.

CENTERFORSECURITYPOLICY: Alexiev testifies on Wahhabi influence in US