When I was younger and more naive, I wondered what kind of person could do PR for a tobacco company – an enterprise selling a product that, when used according to standard practices, leaves a trail of sickness and death in its wake. How could they so boldly mislead, dissemble, and lie outright as a routine part of their work lives?

During every major election cycle, I wonder about a related question. Although I expect politicians to show contempt for truth, ...