By 1860, sectional disagreements between North and South concerned primarily the maintenance or expansion of slavery in the United States. Historian Drew Gilpin Faust observed that "leaders of the secession movement across the South cited slavery as the most compelling reason for southern independence". Although most white Southerners did not own slaves, the majority supported the institution of slavery and benefited indirectly from the slave society. For struggling yeomen and subsistence farmers, the slave society provided a large class of people ranked lower in the social scale than themselves. Secondary differences related to issues of free speech, runaway slaves, expansion into Cuba, and states' rights.