I&#x27;m more than a bit skeptical of anything pre-1750 in that graph, because the &quot;world&#x27;s&quot; reserve currency means something very different in today&#x27;s global economy than what that graph appears to be using to define them.<p>Those might pass for European reserve currencies in a pre-Industrial Era, but they certainly do not reflect the world economy of the time period by any means.<p>In addition to all of that, the USD is the only currency on that graph that was <i>not</i> on a gold standard at the time. That&#x27;s a huge difference.