Why were northwest north americans like the chinookan able to create "complex" or "affluent" gathering and hunting cultures?

In the mid-1800s, how did american indians often react to the us government signing treaties with tribal chiefs to establish reservations? many american indians did not accept the treaties and resisted relocating. many american indians fought for land taken away by the dawes act. many american indians bought land in oklahoma from white settlers. many american indians accepted the treaties and relocated voluntarily.

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

Defined the word imperialism. what is your opinion: should the us engage in imperialism? under what circumstances? offer a brief affective argument against the opinion that you hold.