 The Industrial Revolution created economic specialization and job choice, and it was scary as heck from 1870 to 1890. By 1900, 1910, 1920, we realized we were going to be able to navigate it. But in the late 19th century, it was really scary as people were pushed from farms and pulled to cities and went to try to figure out how to do new work. And the idea of adolescence that we have, which is different than puberty.