State issuance of money and the tax required to imbue it with value is merely a sufficient condition for money to exist. My original point is that as long as a

State issuance of money and the tax required to imbue it with value is merely a sufficient condition for money to exist. My original point is that as long as a states continue to exist, and continue to issue and tax money, money will continue to exist. Debating the history of money is besides the point (though I'd posit that in every case the money was used to a non-trivial extent, it bore some explicit value from a trustworthy authority, be that a state or a local warlord or a powerful corporation...).