On September 30, 1859, before farmers at the state fair in Milwaukee, Lincoln explained that Hammond’s “mud-sill theory” divided the world into permanent castes: capitalists driving the economy and workers stuck at the bottom. But there was another theory: that workers, not capitalists, drove the economy, and hardworking men could—and should—rise. This latter “free labor” theory articulated the true meaning of American democracy for northerners and for the non-slave-holding southerners, who, as Lincoln reminded his listeners, made up a majority in the South. “The prudent, penniless beginner in
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