Matthew Crawford

Earning a doctorate can lead to many careers, but a motorcycle repairman generally isn’t one of them. Not so for Matthew Crawford, holder of a doctorate in political philosophy from the University of Chicago and a champion of grease monkeys everywhere. The 43-year-old left his job at the helm of a K Street think tank for the life of a Richmond mechanic. He will be discussing his recent book “Shop Class as Soulcraft” at Politics and Prose bookstore in Northwest D.C., Tuesday at 7 p.m.