Kazemzadeh has lectured as visiting professor at Stanford University, Harvard University, Columbia University, Lewis and Clark College, the University of Southern California Law School, Haifa University, and the University of Humanities in Moscow.
He is the author of The Struggle for Transcaucasia, 1917-1921 (1952); Russia and Britain in Persia, 1864-1914: A Study in Imperialism (1968), of chapters in several collective works such as the Cambridge History of Iran (1968), and of numerous articles in various journals.
Having been involved for many years in the defense of human rights, Kazemzadeh was appointed in May 1999 by President Clinton to serve on the United States Commission on International Religious Freedom. Kazemzadeh served on the Commission for two terms, retiring in May 2003. He has testified on numerous occasions on human rights issues before congressional committees.
Kazemzadeh is a Bahai. His Bahai activities included thirty-five years of service on the National Spiritual Assembly of the Bahais of the U.S., the governing body of the American Bahai community; teaching at Bahai schools in Europe and America, lecturing in Europe, the Americas, Australia, and New Zealand, and the editorship 1966-2000 of World Order, a Bahai magazine. Dr. Kazemadeh's lecture is cosponsored by the Center for the Study of the Holocaust, Genocide, and Human Rights and the Athenaeum.