"The third prong of this same project was immigration restriction. Progressives understood that if you kept these supposedly degraded people out in the first place, it would not be necessary to segregate them, sterilize them or restrict their marriage prospects. In 1924, progressives won a huge victory with the passage of the Immigration Act that sharply curtailed immigration by preferring northern Europeans or "Nordics" and discriminating against immigrants from Asia, Africa, South America, and even southern and central Europe."