Sayyid Qutb
Sayyid Qutb is considered as the "Father of the Jihadi-Salafi" movement. Hence, followers of the Salafi-Jihadi school are often derogatorily labelled as "Qutbi". Major elements of ISIL ideology as well as it's extremist practices are regarded to be derived from the Jihadist works of the Egyptian scholar Sayyid Qutb and the manuals of hard-line wings of the Muslim Brotherhood movement.