At the end of the 19th century, when the US Congress hoped to buy his tribe's land, the American Indian Chief Seattle made the Seattle Declaration, in which he expressed his doubts about the white man's buying and selling of land.
十九世紀中美國印地安酋長西雅圖，在美國政府希望買下他們世居的土地時，寫給美國政府一封信﹘﹘你怎麼能買賣天空？