The International Association of Sufism (IAS), a California non-profit, humanitarian organization, and a United Nations NGO/DPI, was founded in 1983 by Seyyedeh Dr. Nahid Angha and Shah Nazar Seyyed Dr. Ali Kianfar to introduce Sufism in all its varied forms to the public; to make known the interrelation between Sufi principles and scientific principles; to provide a forum for a continuing dialogue between the different schools of Sufism; and to preserve and advance the study and goals of Sufism.

Over the years, IAS has expanded its works to also provide a global forum for a dialogue amongst interfaith leaders, academia, and poets and artists from diverse cultures and nations; offers grant and micro-loans to women-led groups in rural villages for their services towards equity, education, mental health; and has partnered with humanitarian organizations to provide medical services, clean water, health-education, and promote peace, equality and human rights around the world. IAS has received multiple awards for its services towards peace, human rights and education.