On effective leadership
In the Talmud, the basic unit of meaningful learning is the chevrutah, or studying with a partner. All throughout the classic Jewish sources we see Rabbis coming together to discuss different topics. The most famous of these rabbinic pairs was the one put together by Hillel and Shammai. They were so important and influential that two different schools were created after them. For years, the students attending those schools continued to disagree with one another. It is out of their many disagreements that we got some of the fundamental contours of Jewish law.