Patricia Roberts-Miller's Fanatical Schemes charts the rise of proslavery rhetoric in antebellum America. Roberts-Miller writes in a dense style emphasizing rhetoric and language over politics, and it can be difficult to acclimate if you're looking for a straightforward history book. Still, there's a lot of interest to be mined here, as she zeroes in on common themes in proslavery discussions. There is, of course, the "positive good" argument that bondage is (somehow) good for both master and slave; appeals to economic security and claims that slavery is no worse than working in a factory; and, most interestingly, a 19th Century tone policing that is depressingly familiar. It's not that slavery is a good thing, such writers aver, but that the inflammatory, "intolerant" rhetoric of abolitionists is unfathomably rude. Roberts-Miller puts a lie to this argument, absorbed unconsciously even by resolutely anti-slavery historians, showing that even mild criticism of slavery was enough to send the Calhouns and Hammonds of the Deep South into conniptions, averting that their rights are violated by mere expressions of dissent. This sense of bottomless grievance, inspired not be real slights or actual oppression but an underclass demanding change, animates proslavery rhetoric. And the contemporary reader won't be amiss noting its similarities with similar strands of thought today.