With the passage of the Immigration Act of 1924, eugenicists for the first time played an important role in the Congressional debate as expert advisers on the threat of "inferior stock" from eastern and southern Europe.
Coa aprobación da lei de inmigración Johnson-Reed, os euxenistas xogaron por primeira vez un papel protagonista no debate do Congreso dos Estrados Unidos como expertos asesores sobre a ameaza de "liñaxes inferiores" procedentes do leste e o sur de Europa.