Why they came to America???

Immigration, a spirited topic of debate as to who got here first. The mosaic palate of peoples and cultures which represents today's America heightens the intensity of such a debate. Discoveries made by various anthropologists of human remains over the past few decades provide evidence that long before Ellis Island opened its doors to welcome those seeking political and religious freedom as well as the "adventurer, the wanderer, the persecuted, the fortune seekers, and others" America was a kaleidoscope of ethnic and cultural groups! Thus, the history of US immigration spans a long period of migration of many different peoples from various parts of the world.

Source from: http://www.rapidimmigration.com/usa/1_eng_immigration_history.html

My sentiment are: righ now, still lots of people are holding the dream of fortune came to the United States, whether it is business, visiting relatives, education studying, or working immigrants try to live in this pieces of free land.However, for the people who never been to America may think people now live in America are lucky but they never think about what kind of life we have. For example, you work in a restaurant you may get low pay and have an asperity boss, you can not imagine. If you are lucky, you may have a find job and get retirement pay when you are old. It's depended on your luck and choose.

Who are YOU in this COUNTRY???

WHO are you?? What's your standing in this country?? Illegal as a stowaway or just visit? Or legal as a citizen and have Green Card?
Since 19 century, What happened to the Native American as waves of immigrants arrived from other nations?? Why did each immigrant group come to the United States???