The great physicist Richard Feynman had a father who instilled his brilliant son with an interesting perspective about the world. Sitting down, he would lay the newspaper out on the table and ask his boy questions about what they saw and read. Once, when they came upon a photo of the Pope blessing a group of believers, Richard\u2019s father asked his son if he knew the difference between the Pope and his followers. And then, before Richard could answer, he said, \u201cThe difference is the hat....