Anti-slavery activism, of course, preceded the Republican Party, although it finally found its most effective expression in that party. The earliest opponents of slavery in America were Christians, mostly Quakers and evangelical Christians. They took seriously the biblical idea that we are all equal in the eyes of God, and interpreted it to mean that no person has the right to rule another person without his consent. Remarkably, Christians discovered political equality through a theological interpretation of the Bible. For them, human equality is based not on an equality of human characteristics or achievements but on how we are equally loved by God. Moreover, the argument against slavery and the argument for democracy both rested on the same foundation, a foundation based on human equality and individual consent. The American Anti-Slavery Society was founded in 1833. A few years later, the Liberty Party was founded to pursue emancipation. In 1848, the Liberty Party, anti-slavery Whigs, and Democrats who opposed the extension of slavery merged to form the Free Soil Party. Abolitionism, which sought the immediate end of slavery, had been present since the founding but grew in political strength during the middle part of the nineteenth century. With the passage of the Kansas Nebraska Act--repealing the Missouri Compromise which curtailed the spread of slavery beyond the designated 36-30 latitude--Free Soilers, former Whigs, and abolitionists joined together and created the Republican Party.