1 янв 1965 г. - 1965 - The Hart-Celler Act abolished the National Origins formula that had define US immigration policy since the 1920s. Due to the rise of the civil rights movement, the national origins system was increasingly seen as racially discriminatory, and was replaced with a seven-tier preference system that took into a account a broad spectrum of characteristics including familial relationships and importance to the United States. The Hart-Celler Act was the culmination of decades of increasing openness to immigr