The seed of Nazism’s ultimate objective—the preservation of a pure white race, uncontaminated by foreign blood—was in fact sown with striking success in the United States. What is judged extremist today was once the consensus of a powerful cadre of the American elite, well-connected men who eagerly seized on a false doctrine of “race suicide” during the immigration scare of the early 20th century. They included wealthy patricians, intellectuals, lawmakers, even several presidents. Perhaps the most important among them was a blue blood with a very impressive mustache, Madison Grant. He was the author of a 1916 book called The Passing of the Great Race, which spread the doctrine of race purity all over the globe.
A long-overdue excavation of the book that Hitler called his “bible,” and the man who wrote it
Source: Adam Serwer: White Nationalism’s Deep American Roots – The Atlantic