Emanuel Haldeman-Julius was a Jewish-American socialist writer, atheist thinker, social reformer and publisher. He is best remembered as the head of Haldeman-Julius Publications, the creator of a series of pamphlets known as "Little Blue Books," total sales of which ran into the hundreds of millions of copies.

The Appeal to Reason was a weekly left-wing political newspaper published in the American Midwest from 1895 until 1922. The paper was known for its politics, lending support over the years to the Farmers' Alliance and People's Party before becoming a mainstay of the Socialist Party of America, following that organization's establishment in 1901. Making use of a network of highly motivated volunteers known as the "Appeal Army" to spur subscription sales, paid circulation of the Appeal climbed to more than a quarter-million copies by 1906 and half a million by 1910, making it the largest-circulation socialist newspaper in American history.