You cannot find any technology by any totally global government used to insure that people could not buy or sell without the mark in their foreheads or hands
IN ANY OTHER ERA. NONE.
For one, there was not any such global government truly encompassing the globe in any other era.
Case closed. You didn’t have a chance before you started. It’s just the way the facts are.
Who said one needed technology and not just a tatoo or mark, and a law that you can't buy or sell without one?