They were unconstitutional
A, after the US won the Battle of Midway.
The UK, France, Canada, The Soviet Union, China, and later, The United States
The 1st amendment gives:
Freedom of religion - Freedom of religion allows you to practice any religion.
Freedom of speech - Freedom of speech gives you the right to express your opinion in public.
Freedom of the press - Freedom of the press to publish anything without the government censorship
Freedom of assembly - Freedom of assembly allows people to gather and petition.
Political activism - Freedom of activism allows people to protest.
Yes, the United States should have joined the League of Nations.
The League of Nations was created after World War I and was made by the countries that had won the war. They wanted to try to keep the peace and hopefully prevent another world war.
The catch is, the League of Nations was essentially useless. It was<em> </em>very weak and obviously did not prevent World War II from happening. The American public was not interested in joining, the League had no real power to enact any rules, they had no troops whatsoever, and the League was not representative enough to do anything.
While the League of Nations was very weak and useless, it was still a good idea. I believe the United States should have joined the League of Nations because of this. Since it was a good idea, the United Nations was made after the League ended. The United Nations is much more powerful and learned from the flaws that the League of Nations endured.