The Patrons of Husbandry—or the Grange—is the longest-lived US agricultural society and, since its founding shortly after the Civil War, has had immeasurable influence on social change as enacted by ordinary Americans. The Grange sought to relieve the struggles of small farmers by encouraging collaboration. Pathbreaking for its inclusion of women, the Grange is also well known for its association with Gilded Age laws aimed at curbing the monopoly power of railroads. In Essentials, Unity takes...