In terms of specific immigration restrictions, Hoppe argued that an appropriate policy will require immigrants to the United States to display proficiency in English in addition to "superior (above-average) intellectual performance and character structure as well as a compatible system of values". He suggested that these criteria would lead to a "systematic pro-European immigration bias". Jacob Hornberger of the "Future of Freedom Foundation" argued that the immigration test Hoppe advocated would probably be prejudiced against Latin American immigrants to the United States.