We have reached a critical moment in the life of the institution known as a "central bank." A central bank, as many of you likely know, is paradigmatically a bank that is NOT part of the government that it serves, an institution that has both private and public characteristics, and an institution that serves as the grease for macro-economic gears in the machinery of governance. Alexander Hamilton, an admirer of the London model, brought the institution to The United States. We now have a rather peculiar form of central bank, the Federal Reserve Board, created by the Wilson administration more than a century ago. Its peculiarities need not interest us today. But as I said above, we have reached a critical juncture. The central banks of the developed world appear to be running out of their usual arrows. They'll have to come up with something non-traditional when the traditional quiver is empty. What might that be? They might adopt distributed ledger technology -- ...