What do americans value as the basic individual or natural rights?

life, liberty, and the pursuit of happiness

Explanation: On July 2, 1776, the Continental Congress voted to declare the independence of the American colonies from English rule. On the Fourth of July, they approved the final edited version of the Declaration of Independence.  

The members of the Continental Congress made only two minor changes in the opening paragraphs of Jefferson's draft declaration. In these two paragraphs, Jefferson developed some key ideas: "all men are created equal," "inalienable rights," "life, liberty, and the pursuit of happiness."  

The Last ones are known to be individual rights.

using the scientific method.