Born to a family of important rabbis, Soloveitchik has become the most important twentieth-century philosopher of Orthodox Judaism. He resides in Boston but serves as the head of the Theology Seminary of Yeshiva University in New York. Soloveitchik is well schooled in modern philosophy; his doctoral dissertation at the University of Berlin was on Hermann Cohen's epistemology. His knowledge of Jewish law is unsurpassed. He brings together existentialism, neo-Kantian rationalism, and Orthodox faith into a complex system of thought.