My first semester in college, I signed up for a philosophy class. The professor was short and stocky, had long hair and an attitude of defiance, even anger, which, I guess, was a sign of the times—it was 1968 and colleges were filled with defiant, angry people. I still remember the sound of his cowboy boots as he stomped up the aisle to the chalk board. I was already intimidated. “Who are you?” he wrote, the chalk clicking loudly against…..