For understanding US public debt one first has to understand US money system following the establishment of the Federal Reserve in 1913. Everything changed since then. The issuance of the money was put into the hands of villainous private bankers who actually designed the system in their private meeting in the Jekyll Island. Bankers have been fighting ever since the American Revolutionary War to take over the US money system.

Their chain goes back to the British bankers who had affected their own financial coup by establishing the Bank of England in 1694 less than half a century after Oliver Cromwell toppled the British Catholic King in 1648 and nullified the Christian prohibition of usury.

Since then bankers have been behind many wars, economic crisis and conspiracies against humanity. They are the #1 profiteers from wars as nations' need for finance skyrockets during wars.

There are many sources available on this very vital but marginalized topic but the award-wining documentary by Bill Still is a good place to start

For those who are in mood for reading I recommend Web of Debt: The Shocking Truth about Our Money System, by Ellen Brown.

amazon.com/Web-Debt-Shocking-Truth-System/dp/0983330859