Kurdish women have fought on the front lines of military battles since the 19th century. A scholar explains the origins of Kurdistan's relative gender equality in a mostly conservative Muslim region.
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.
The US is doing so with increasing frequency around the world – most recently with Kurdish fighters in Syria. A scholar explains what can go wrong, and why this approach is likely to continue.