Explain and cite evidence that shows which of these subjects had the biggest imp

Explain and cite evidence that shows which of these subjects had the biggest impact on US society from 1914-Present.
The MINIMUM words to fully answer this question is 750 words, but the best essays are around 1000-1500 words.
You are picking one topic as the most important.  Of course, you may talk about the other topics.  However, remember that you are still arguing that your topic is the most influential.  As long as you remember to illustrate why your topic is the most important.
NEED 5 DIFFERENT SOURCES
                NEED at least 2 PRIMARY sources (assignments and the modules) and 2 PROFESSIONAL Secondary sources (Textbook, JSTOR article NOT HISTORY.COM)