Explain the significance of these founding documents and how they altered the concept of government that had prevailed in society before their creation

The document that stated that certain rights were not given by the government, but that men were born with them was the Declaration of Independence. This applied to all men and women equally.

The articles of confederation and the U.S. Constitution also played a big role since they united the individual states and established the federal government. The national government and fundamental laws, guarantying the basic rights for the citizens respectively.

I hope it helps, Regards. 

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