, the United States did not officially join the League of Nations due to opposition from isolationists in Congress.
While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them.
Specific people who valued religion quite significantly played a role in this. I have studied this material so long ago that I cannot name those particular figures. Do some research and I'm sure you'll be able to find out for yourself.
The growing season in the interior plains is going to be five to six months
