American history

1. From 1914 until 1941. What were the major political and cultural events and historical figures? What were the important cultural and social changes in that period? 

2. In regards the movie The Grapes of Wrath. What impression did the movie leave you with? What do you think of the visual dimension the movie adds to the period? Any thoughts or comments you would like to share?

Please incorporate the 2 questions in your submission!