The person who wrote this is Robert Frost
No, it is not a run on sentence.
Answer:
Individualism. The most important thing to understand about US Americans is probably their devotion to "individualism." They have been trained from early in their lives to consider themselves separate individuals who are responsible for their own situations in life and their own destinies.
Explanation:
Anxious - no
egotistical - yes
naive - no, possibly, but i don't think so
misled - yes, but i'm also unsure