Hiro would have chalked it all up to class differences, except that her parents lived in a house in Mexicali with a dirt floor, and his father made more money than many college professors. But the class idea still held sway in his mind, because class is more than income -- it has to do with knowing where you stand in a web of social relationships. Juanita and her folks knew where they stood with a certitude that bordered on dementia. Hiro never knew. His father was a sergeant major, his mother was a Korean woman whose people had been mine slaves in Nippon, and Hiro didn't know whether he was black or Asian or just plain Army, whether he was rich or poor, educated or ignorant, talented or lucky. He didn't even have a part of the country to call home until he moved to California, which is about as specific as saying that you live in the Northern Hemisphere. In the end, it was probably his general disorientation that did them in.