Might I also suggest going back even further. There is not much information on the Knights Templar, but from what is written, they engaged in what would be considered a full reserve manner. Their receipts were backed 100% by an individuals deposits and a system was in place to prevent forgery. The King wound up killing them and confiscating their earnings.
Though not in the US research John Law, and the disastrous economic policies that he followed and implemented. Law also helped disprove the Keynesian economists before they were Keynesian. So did Alexander Hamilton, and the assistant sec treas Duer along with the central bank (and of course many other policy makers and bankers).
As to the flaw’s of a banking system. One of fractional reserves, currency debauchery along with interest rate and market manipulation would be flawed and doomed to fail in it’s inception.