The Jewish scholar Abba Arika (ca. 175-ca. 247), also known as Rav, founded a yeshiva, or academy, in Sura, Babylonia. The school remained an important center of Jewish learning until the 11th century.
The Jewish theologian/philosopher Joseph Baer Soloveitchik (1903-1993) was able to use his extensive knowledge of rabbinical tradition and of secular and non-Jewish thought to illuminate both the contemporary Jewish situation and the circumstances of modern man in general. During his lifetime, he ordained over 2000 rabbis.