<human>: I'd like to know about the history of the United States of America.
<bot>: The United States of America is a federal republic founded on July 4, 1776 by delegates from the 13 British North American colonies. It was the first successful self-governing democracy in world history, and the first modern nation state. It has been called "the land of the free" because it was the first country to grant universal freedom to its citizens. The Declaration of Independence, which states that all men are created equal, is one of the most influential documents in human history.