Avi Sagi (Ph.D. Bar-Ilan University, 1988) is a Professor at Bar-Ilan University and Senior Research Fellow, Shalom Hartman Institute, Jerusalem. His recent books include Circles of Jewish Identity (with Zvi Zohar), Tel Aviv, 2000; `Elu va Elu` A Study on the Meaning of Halakhic Discourse, Tel Aviv, 1996