When we initially undertook to write this series, the goal was to provide context for GMO’s clients who operate in a marketplace dominated by the US dollar, first by examining its path to becoming a reserve currency, and then by looking at its current status in the global economy. Additionally, we hoped to continue to dispel myths about sovereign debt in developed countries. As we showed in Part I, current metrics of sovereign debt sustainability appear to be rather meaningless for a developed country sovereign that issues in its own currency. Part II is meant to be read in conjunction with Part I, resulting in a foundational treatment regarding reserve currencies and sovereign debt.