Henry Ford purchased the Dearborn Independent with the publication therein of a series of articles in from 1920 through 1922 which were subsequently published in four volumes, as The International Jew: The World's Foremost Problem.
When Adolf Hitler took power in Germany in 1933, both Germany and the US were flooded with mass-produced anti-Semitic literature, at the core of which was the text of the Protocols of Zion.