The remarkable influence of the union politics and primitive democracy of Iroquois Confederacy on the establishment of USA and its democratization had long been ignored until the last quarter of 20th century. It is now somewhat widely accepted that Iroquois had taught the founders in many ways in founding the USA. On the one hand, some most important aspects, such as the union form of nation and the checks and balances in power structure, of the USA were coined from that of Iroquois Confederacy. On the other hand, the democratization and nationalization of civil rights and civil liberty in USA were also encouraged by Iroquois equality and long practice of democracy.