stopping smoking may cause you to gain weight. Also, taking birth control pills and anti depressants can cause weight gain. The use of those medications have increased. But of course, the new thought repellent field will start up, and we'll have to hear about how fat people are just simply bad people and the whole country will explode because some people aren't up to beauty standard.
Also, I didn't understand this series, so my brain rendered it as a sci fi story, and the problems with the whites as problems that could spill out and infect all of us. I bet when I am older, I'll understand what the fuck this guy is talking about.