So, in the mindset of pro-slavery men, slavery was for protecting the common good of slaves, masters, and society as a whole. These and other arguments fought for the rights of the propertied elite against what were perceived as threats from the abolitionists, lower classes, and non-whites to gain higher standards of living.
The correct answer is be a Populist alternative to the Democratic and Republican Parties.
The party was founded on a populist platform given that it advocated and campaigned for rights of the common people. It also appealed to the wisdom and virtues of the common people