We like to think of physics as moving toward unity, but at any one moment it is fragmented into specialties, which sometimes seem even to define different scientific personalities. This certainly appeared to be the case when I arrived in Palmer Lab at Princeton University as a new graduate student just 30 years ago. Physicists who worked on strong and weak interactions seemed to me to be very different sorts of animals, differentiated especially by the quantity and nutritional value of the data on which they fed.