Stephens indicates that understanding of racial inequity supplants the Founders' previous belief that all men are created equal because science is the foundation of progress. He is specifically referencing Phrenology, a racist pseudoscience popular at the time.
These three key concepts were included in the Declaration of Independence: Life, Liberty, and the Pursuit of Happiness are among the Unalienable Rights that all people possess. Men have inherent equality. People have a civic obligation to protect these rights for other people as well as for themselves. The Declaration of Independence was ratified by the Continental Congress on July 4, 1776, and the 13 American colonies used it to sever their political connections to Great Britain. The Declaration listed the justifications for the colonies' desire for independence.
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