Tracing the development of a nation’s currency can provide a unique glimpse into the nation itself. But currency is complicated — its history often defies a simple straight-line narrative, and there are countless technicalities along the way that threaten to glaze over the eyes of anyone without a degree in economics. So let’s take a look at some of the most interesting moments in the history of U.S. currency, and leave the rest to the economists. The First National Bills Were Called ...