What were the Plains peoples way of life before and after the arrival of white settlers?

What were their "meeting survival needs," customs, and land use before and after the arrival of white settlers?

3 answers

http://en.wikipedia.org/wiki/Plains_Indians

http://nativeamericans.mrdonn.org/plains.html
Could you help me on a question Ms. Sue please?
My question is How did the English-speaking white settlers change life for the Mexicanos in the Southwest?