Final answer:
The author's viewpoint in the article is that the Iroquois Confederacy was impressive and its ideas influenced the development of the American government.
Step-by-step explanation:
The author's viewpoint on the effectiveness of the Iroquois Confederacy in the article "The Iroquois Confederacy" is that the Iroquois Confederacy was impressive and many of its ideas were used to develop the American government. The article mentions that the Iroquois Confederacy adopted a constitution that incorporated concepts of checks and balances and separation of power, which impressed future Americans. Furthermore, historians maintain that many principles of the Iroquois Confederacy's constitution were woven into the United States Constitution.