That answer is material abundance. After world war 2, The United States was known for being one out of 2 Super powers of the world (other one being the Soviet Union) The American economy was skyrocketing, Americans had the highest standard of living at that time. It all came down to the US being mainland being virtual untouched, this allowed to US to produce guns,weapons,materials, Etc at a larger scale than any nation of the war. The US was lending these items to its Allie’s (Russia,France,the uk) and in return they would pay back the US after the world. The increase of these items for there Allie’s during world war 2 brought a lot of jobs for Americans and brought employment up.