Pretty much sums it up.Depends on how far back you want to go. Spanish Peso was arguably the first 'global' currency, at least to the western hemisphere. The USD started the path to global reserve currency status in the WWI era and was firmly entrenched in the post-WW2 era. This was further cemented by the petro-dollar in the mid 70s. Basically our currency rose to prominence because of a very strong industrial base and because nobody had bombed the **** out of our infrastructure, so people who had their infrastructure bombed to **** had to pay us for things they needed as they rebuilt.