The United States of America is perhaps the only country in the world, which is based on the pillars of migration by citizens of other nations over the periods of time. The actual citizens were supposed to be of Red Indian origins, and their tribes were demolished by the British army during their conquests, and the Caucasian population today has their ancestral origins in Europeans invaders and travelers. These settlers then brought in slaves from other parts of the world, mainly then people from Africa, who were of health bodies, and were put on bare minimum wages, and were exploited by their masters. Eventually after many years of America 's independence, these people started voicing their rights, and they came into a category of "African-American", and as the years passed, legally they got rights as normal citizens. America as it developed from all spheres, a new kind of migration started commencing, whichwas based purely on intellectual basis, and America started lenient immigration rules for people who held, high qualifications, and was filling up these vacant research
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