Martin Buber was professor at the Hebrew University of Jerusalem where he taught courses in anthropology, sociology, philosophy, and Hasidic and biblical studies. He is best known for his book I and Thou. Paul Mendes-Flohr was professor emeritus of modern Jewish thought at the Hebrew University of Jerusalem and professor emeritus of Jewish intellectual history at the University of Chicago. He is the author or editor of many books, including A Companion to Martin Buber, also published by the University of Chicago Press. Raef Zreik is a Palestinian citizen of Israel, a jurist, and associate professor of law at Ono Academic College, Israel.