Many "modern" inventions actually have precedents dating back over 1000 years.
Calls for a reformed, modern Islam will not combat the political and social motivations that underly radical and extremist ideologies.
Militants are tapping into centuries-old literary tastes, appropriating them for their own nefarious ends.
A struggle is underway for the heart and soul of Islam. Moderate Muslims need to engage in the contest to ensure their view of Islam is the one that prevails.
The Caliphate has inspired disputes among Muslims for centuries, but attempts at revival in modern times are unlikely to succeed. Most of the world's Muslims would not accept its authority over them.