How does the author develop the idea that world war ii created positive change in the united states?

American modernism , much like the  modernism   movement in general, is a trend of philosophical thought arising from the widespread changes in culture and society in the age of  modernity . american modernism is an artistic and cultural movement in the united states beginning at the turn of the 20th century, with a core period between world war i and world war ii. like its european counterpart, american modernism stemmed from a rejection of  enlightenment   thinking, seeking to better represent reality in a new, more industrialized world