Shaykh Hamza Yusuf is the President and co-founder of Zaytuna College, the first accredited Muslim liberal arts college in the United States, where he also teaches across several disciplines in the Islamic curriculum. A leading Islamic scholar and public intellectual, he has played a pivotal role in advancing Islamic education in the West and fostering interreligious dialogue.
In addition to his teaching, Shaykh Hamza has authored numerous academic articles and encyclopedia entries. His published works include original writings and acclaimed translations, such as Purification of the Heart: Signs, Symptoms, and Cures of the Spiritual Diseases of the Heart; The Creed of Imam al-Tahawi; The Prayer of the Oppressed; The Content of Character: Ethical Sayings of the Prophet Muhammad; and Caesarean Moon Births: Calculations, Moon Sighting, and the Prophetic Way.
He is a member of the Supreme Fatwa Council, led by his mentor Shaykh Abdallah bin Bayyah, and serves as Vice President of the Forum for Promoting Peace in Muslim Societies, a global initiative dedicated to countering extremism by addressing its intellectual and social roots.
Shaykh Hamza holds ijazat (traditional teaching licenses) in various Islamic sciences from renowned scholars around the world, as well as a Licentia Docendi in multiple Islamic disciplines. He earned a B.A. in Religious Studies and holds a Ph.D. in North and West African Intellectual History, with a focus on classical Islamic thought.
Joel Halldorf is a Swedish theologian, church historian, and public intellectual, known for his work on the role of religion in modern society and its intersections with politics, culture, and secularism. He is Professor of Church History at the University College Stockholm (Enskilda Högskolan Stockholm) and a regular columnist for the Swedish national newspaper Expressen. He is also affiliated with the Sigtuna Foundation and contributes frequently to public debates on religion and society in Sweden and beyond.
Halldorf’s scholarship explores the intellectual and spiritual traditions of Christianity, particularly within Pentecostal and free church movements, as well as the broader dynamics of faith in a secular age. He is a sought-after commentator on the place of religion in Scandinavian public life, and his work bridges academic theology with contemporary cultural critique.
He has authored and co-authored several books in Swedish, including, Gud: Jakten (2014), Kyrkan och den moderna världen (with Patrik Fridlund, 2016), Bokens folk: ett försvar för den religiösa människan (2021), and Längtan efter meningen: berättelsen om vår tids andlighet (2023).