sentences:  Upon his return to Britain, Husain worked as a senior advisor to former UK Prime Minister Tony Blair.In 2008, he cofounded the think tank Quilliam, which "aims to challenge extremist narratives while advocating pluralistic, democratic alternatives that are consistent with universal human rights standards" and "stands for religious freedom, equality, human rights and democracy".Husain later joined the Council on Foreign Relations in New York, where he was Senior Fellow in Middle Eastern Studies.