Ed Husain is the author of The Islamist, a memoir of his time inside radical Islamism. Having rejected extremism, he now advises governments and political leaders on Islam. He is a senior fellow at Civitas, Institute for the Study of Civil Society in London, and a global fellow at the Woodrow Wilson International Centre in Washington DC. He was a senior fellow for Middle Eastern studies at the Council on Foreign Relations (CFR) in New York for five years and co-founded Quilliam, the world's first counter-extremism think-tank, in Britain. His latest book is The House of Islam - A Global History, and he'll talking about the issues it raises at the WORD Christchurch festival.