My generation was obsessed with scoliosis. Judy Blume dedicated an entire novel to it. At least once a month we would line up in the gym, lift our shirts, and bend over, while some creepy old doctor ran his finger up and down our spines. Nuclear war was a high-concept threat, two words that often rang out in political speeches or on the six o-clock news. Our spines. Lice. Nuclear war. The Big Three.