[source: Islamic Threat Myth or Reality, p. 

QUTB AND MAWDUDUI ARE THE GODFATHERS OF MOST CONTEMPORARY ISLAMIST MOVEMENTS
In their formative stage, most of these organizations have been particularly 
influenced by the trailblazers of contemporary Islamic activism: Mawlana 
Mawdudi, Hassan al-Banna, and Sayyid Qutb.
[source: Islamic Threat Myth or Reality, p. 152]

ISLAMISM ALSO DRAWS ON IBN TAYMIYYAH AND IBN HAZM
In addition they draw on early Islamic reformers like ibn-Hazm and ibn-Taymiyyah 
as well as twentieth-century Muslim activists and nationalist leaders in the 
Maghreb such as Malek Bennabi and Ben Badis.
[source: Islamic Threat Myth or Reality, p. 152]