What impact did world war 2 have on America and the world?

World War II significantly transformed America and the world by establishing the U.S. as a dominant global superpower, both militarily and economically. The war accelerated technological advancements and spurred economic growth, leading to the post-war prosperity known as the "American Century." Globally, it resulted in the formation of the United Nations and set the stage for the Cold War, reshaping international relations and leading to decolonization movements in Asia and Africa. The conflict also prompted social changes within the U.S., including advancements in civil rights and shifts in gender roles as women entered the workforce in unprecedented numbers.