The reasons are far too numerous to list all of them here, entire books have been written outlying why Fiat currency is bad over all for humanity however for

The reasons are far too numerous to list all of them here, entire books have been written outlying why Fiat currency is bad over all for humanity however for me, I am supporter of extremely limited government, as such commodity based money is a natural limit on how much government a civilization can have, as government can only directly tax soo much before the citizens revolt, fiat currency allows them to tax by inflation and take on far more debt than a commodity currency would allow. Also fiat currency makes War between nations far more economically possible.