AskHistorians

Some claim it was foundational or even that the US system was based on the Iroquois Confederacy, but both positions are difficult to reconcile with the history of the development of US political thought in the years leading up to the American Revolution, and the extremely heavy influence of (European) Enlightenment writers and Old World political systems on the US. Furthermore, there aren't many structural similarities between the two systems.

Its influence, such as it was, should be seen as more in the form of cultural diffusion, assisting the normalization of consensus-government as an alternative to majority-government, and reinforcing pre-existing beliefs about decentralized polities being viable.