The Republican Party emerged from the great political realignment of the mid-1850s. William Gienapp argues that the great realignment of the 1850s began before the Whig party collapse, and was caused not by politicians but by voters at the local level. The central forces were ethno-cultural, involving tensions between pietistic Protestants versus liturgical Catholics, Lutherans and Episcopalians regarding Catholicism, prohibition, and nativism. Anti-slavery did play a role but it was less important at first. The Know-Nothing party embodied the social forces at work, but its weak leadership was unable to solidify its organization, and the Republicans picked it apart. Nativism was so powerful that the Republicans could not avoid it, but they did minimize it and turn voter wrath against the threat that slave owners would buy up the good farm lands wherever chattel slavery was allowed. The realignment was powerful because it forced voters to switch parties, as typified by the rise and fall of the Know-Nothings, the rise of the Republican Party, and the splits in the Democratic Party.