The assassination of Archduke Franz Ferdinand that lead to the devastating, destructive period known as WWI.
at age 40, Muhammad received the first of a series of revelations
... because they opposed the United States becoming a member of the League of Nations.
The League of Nations was the signature idea of President Woodrow Wilson, point #14 of his 14 Points, an international peacekeeping association which he recommended for post-war settlements. The Treaty of Versailles adopted that idea, but back home in the United States, there was not support for involving America in any association that could diminish US sovereignty over its own affairs or involve the US again in wars beyond those pertinent to the United States' own national security.
Traffic fatalities related to alcohol were increasing <span> factors indicated that government regulation of alcohol consumption was needed.</span>
The contributions of women in the WWII changed the women’s role in the United States because women started to do more work outside of their homes. Basically WWII solidified that women were in the workforce to stay.