Stoddard was a strong believer in white supremacy and its assertion of the natural inferiority of colored races. And as a racist theorist and white supremacist he had a significant influence. In The Rising Tide of Color Against White World-Supremacy in 1920, Stoddard presented a view of the world situation pertaining to race and focusing concern on the coming population explosion among the non-white peoples of the world and the way in which “white world-supremacy” was being lessened in the wake of World War I and the collapse of colonialism. The map shows Stoddard’s analysis which divided world politics and situations into “white,” “yellow,” “black,” “Amerindian,” and “brown” peoples and their interactions.

The Nazi Party’s chief racial theorist Alfred Rosenberg got the racial term Untermensch from the German version of Stoddard’s 1922 book The Revolt Against Civilization: The Menace of the Under-man.

https://en.wikipedia.org/wiki/Lothrop_Stoddardeugenist