Relatively soon after the Immigration Act of 1924 was passed, the popularity of using racial theories of intelligence as guideposts to immigration law and policy waned.

The psychological work with the closest influence on later immigration policy was performed by Robert Yerkes of Harvard University.

The nascent science of intelligence testing developed in confluence with growing support for more severe controls on the acceptance of foreign-born entrants to the United States.

The forty-one volumes of statistical material on immigration eventually published by the Dillingham Commission contained a wealth of information that provided support for limiting immigration, thereby helping lead to passage of the Emergency Immigration Act of 1921 and the Immigration Act of 1924.

The U.S. Commission on Civil Rights is a federal commission tasked with protecting the civil rights of all people residing in the United States.

Since its creation, the Coalition for Humane Immigrant Rights of Los Angeles (CHIRLA) has worked as an immigrant advocacy group with Southern California’s Los Angeles County.

Through its many publications, public statements and links to conservative legislators, the Center for Immigration Studies has become an influential voice in the congressional debate over immigration policy.

Mandated by the U.S. Constitution, the decennial censuses were originally undertaken for the purpose of apportioning congressional seats, electoral votes in presidential elections, and funding of government programs among the states.