meat to eat, get fur to wear…”[4] however, due to the markets’ need of buffalo fur，the American government

encouraged the hunting of buffalo。 From 1871, about 3 million buffalos were hunted every year。[5] In 1878, the southern buffalos were extinct。 5 years later, northern buffalos disappeared, too。 [1] Those American Indians, who lived in the southwest area and had been living on buffalo hunting, had to move to the reservation and lived on the meager allocation from federal government, because there were no buffalo for them to hunt。[9] Third, the war between American Indians and Americans as well as the germs brought by the Europeans killed most of American Indians。 From the 15th century to the 19th century, the population of American Indians decreased dramaticallybecause of wars and diseases。 Before Columbus arrived at America, there lived more than 5 million American Indians in the America continent。 However, in the 1990s, after the Battle at Wounded Knee, only 250,000 American Indians left。 [7] Fourth, there are some researches showing that Americans facilitate American Indians’alcoholism on purpose。 During the process of negotiation of “Chicago treaty” in 1821, a chef of Potaw atomies begged an American official, “Father, we don’t care money, cargos, or land。”All we need is whiskey。 Please give us Whiskey。[3]