The IS 'caliphate' centred on Mosul, had its own justice system served, efficiently, by its own police force.
The Islamic State group, often called ISIS, is not just based in Iraq and Syria. A scholar tracks where the group and its affiliates have spread around the globe.
Interviews with the Yazidi survivors of IS attacks that killed 3,100 people in 2014 reveal the emotional, cultural and spiritual scars of religious persecution.
Iraq beat the Islamic State. Now, its Shia government is jailing and even executing all suspected terrorists – most of them Sunni Muslims. The clampdown may inflame a centuries-old sectarian divide.
Despite the fact that the Islamic State is on the run, the terrorist group still manages to inspire, motivate and maintain the social identity and cohesion of its members. Here's how.
Islamic State propaganda uses a narrative of centuries-old 'crusader' aggression.
Islamic State has destroyed globally-significant sites in Iraq and Syria, but not as wanton acts of destruction. Instead, they are calculated political and religious attacks.
Was the London attacker acting alone? Was he really a soldier of the Islamic State? Research on the nature of jihadism in the West reveals possible answers.
Even when ISIS is defeated, unless different groups can repair their relationship, violent extremism will remain, and peace in Iraq will stay elusive.
Mesopotamia is known as the 'Cradle of Civilization'. We must not let it continue to be a cradle for genocide and terrorism.
The humanitarian crisis in the Middle East is getting worse by the day. A survey of aid workers provides a glimpse into life on the ground, and clues to why the humanitarian sector is ailing.
What happens to the Islamic State if it loses the battle for territory in Iraq and Syria? Here's a list of ways it might go down.
A young boy is strapped with explosives and sent to detonate himself and those around him at a school. An expert on terrorism explains how and why children become embroiled in militant conflicts.
Profit estimates have ranged from $4 million to $7 billion. But with the Paris attacks costing only $10,000, does a number even matter?
The final article of our series on the historical roots of Islamic State examines the role recent Western intervention in the Middle East played in the group's inexorable rise.