He made us think. I think it was the first time I was really made to think in high school. Instead of just learning about the major revolutions in history, we relived them. Playing the devil's advocate, he forced us to look at the world through the eyes of the people involved. We took their parts and argued their causes, and tried to convince each other what was just. This way, we understood the complexity of history, and its meaning for us, and no longer conceived of it simply as a time line to be memorized.