Why and how did american farmers organize during the late nineteenth century?

Applied Darwin's theory of natural selection and "survival of the fittest" to human society -- the poor are poor because they are not as fit to survive. Used as an argument against social reforms to help the poor.Sherman Antitrust Act1890 - A federal law that committed the American government to opposing monopolies, it prohibits contracts, combinations and conspiracies in restraint of trade.Nativism