How does ISIS justify violence? Tracing the complex roots of its policy of brutality.
Isis has shocked the world with its fundamentalist terrorism, which it claims is justified by the tenets and scriptures of Islam. But can philosophical truths be found in its doctrines of jihad?
Watch ISIS: Origins of Violence and more acclaimed documentaries on BBC Select today. Restrictions apply*.
ISIS: Origins of Violence on BBC Select
In this brave film, English historian Tom Holland explores the tensions between Islam and Western secularism and asks tough questions about the roots of Islamist violence.