How was world war 2 a turning point in history?

Why do you think? WW2 killed millions, lead to the formation of the EU and others. It lead to Germany being destroyed and rebuilt in half(Half of it was under American control and the other was under soviet). It caused the death of the United Kingdom. Its still a country, but when America joined the war, they went to Europe for all  (or most) of englands colonies. Need more reasons or did I spark a train of thought? Let me know

Trade and commercehope i !

Protecting and assisting  u.s. citizens  living or traveling abroad; assisting u.s.  businesses  in the international marketplace; coordinating and providing support for international activities of other u.s. agencies (local, state, or federal government), official visits overseas and at home, and other diplomatic efforts.keeping the public informed about u.s. foreign policy and relations with other countries and providing feedback from the public to administration officials.providing  automobile registration  for non-diplomatic staff vehicles and the vehicles of diplomats of foreign countries having  diplomatic immunity  in the united states