Final answer:
The knowledge of early Americans is limited due to the lack of written records and the impacts of colonization. The Iroquois Confederacy was a political and military alliance of Native American tribes that influenced the U.S. Constitution.
Step-by-step explanation:
The knowledge of early Americans is limited due to various reasons. One reason is the lack of written records. Early Native American tribes did not have a writing system similar to that used by Europeans, so their history and culture were mostly passed down orally. Additionally, European colonization and the subsequent displacement and forced assimilation of Native Americans further contributed to the loss of their historical knowledge.
The Iroquois Confederacy, also known as the Haudenosaunee Confederacy, was a political and military alliance formed by the Mohawk, Seneca, Onondaga, Oneida, and Cayuga tribes in the mid-16th century. The alliance was later joined by the Tuscarora tribe. The Iroquois Confederacy had a constitution called the Great Law of Peace, which implemented democratic principles, separation of powers, and checks and balances. It served as an inspiration for the founding fathers of the United States, who incorporated some of its concepts in the U.S. Constitution.