Why did the United States manage to take a leading position in the Western world after World War II?

The United States had a fairly good position even before the war, but it was not advertised much. For a long time this state did not have a war with other states on its territory. The civil war was already forgotten. The economic crisis was successfully weathered. The state pursued a reasonable domestic and foreign policy. The volume of external sales to Europe and the USSR can be a confirmation of the veracity of these words. When World War II broke out, the United States did not rush into it thoughtlessly. They declared neutrality, but in this way the industry stood idle. The industry was reoriented to the production of military products rather smoothly. The military budget was significantly increased. By the time it entered the war, the United States was already ahead of any European country in armaments. It should be noted that the United States also had huge finances. The absence of hostilities on US soil made it possible to increase its superiority in the world arena. Other states suffered significant losses in this war.