WWII started on September 1, 1939 when Germany invaded Poland.
Answer: It killed alot of people & reduced the influence of the Catholic Church.
Explanation:
Popular sovereignty is the concept that is best stated by the declaration of independence. <span>That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed (Declaration of Independence preamble) in other words that governments are meant to protect its citizens. </span>