Brief description of immigrants life and laws before and now in the U.S.

Why do the immigrants come to the U.S.?
   - economic hardship like potato crop failures, famine
   - religious persecution, freedom of expression like Jews in Russia, Poland, Romania.
   - After some big events ended, displaced person, homeless, refugees, orphans and war brides were allowed to immigration.


The differences the immigration laws between before and now in the U.S.
[ before]
  - The U.S very opened to immigrate because of less population, industrial revolution and westward movement.
  - Most immigrants were the Europeans in 1800~1920.
  - All immigrants must have taken a medical examination, so the permission was decided by their health condition.
  - Asian immigrants were limited for 10 years.
 [ Now]
  - During the 1920s, the first quota law was passed by congress, limiting the total number of immigrants  allowed and the number allowed from each country.
  - A person who has occupational skills may be allowed to immigrate.
  - A person who has immigrate relatives of U.S citizens may come in without limitation.