Treasury Bonds were invented in the 1860's for the purpose of placing America into debt. The inventors of T-bonds were bankers in England who designed the system to force the "slaves to feed and house themselves, without them realizing they were slaves". (I can't find those letters on the internet any more; I read them ~10 years ago.)
1907 Bank Panic
1908 Titanic commissioned
1912 Titanic sank (by-passing immigration)
1913 Income Tax Amendment
1913 Seventeenth Amendment - Popular Election of Senators
1913 Federal Reserve Act
1914 WW I
A permanent segregation was built into the legislation: bond-payers and bond-owners.
Debt is a means to an end. It keeps the population working while title to land and businesses is transferred among the bond-owners.