Question: Unable to replicate the agricultural techniques of the Anasazi, the Paiutes were destined to a semi-nomadic lifestyle until European settlers arrived, changing the nature of existence in the valley forever.
European settlers taught the Paiutes a new lifestyle.

Answer: yes

Question: There are also scores of Celtic croses.
There are many Celtic crosses.

Answer: yes

Question: Yet Greider's less bold (but still frightful) assertion that the global system ...
Greider's less ambitious idea that the global system...

Answer:
yes