EXTREMIST TRADITIONS IN ISLAMISM
Out of happenstance I came across three links that give some historical background to different strands of Islamist thought for the general reader:
" Kharijite Islam
" at GlobalSecurity.org
, "What's Worse than Violent Jihadists?
" on Mahdism by Timothy Furnish
and finally from an article originally in the ME Quarterly
, " Fundamentalist Islam: The Drive for Power
" by Martin Kramer
( though Kramer leaves out Muhammed Abduh's contribution, he does cover al-Afghani).