What is the most important source of american unity

This question forces the answer to come off as rather bias, so I’m going to try and be as factual as possible. The constitution and Declaration of Independence are very important, as well as having the freedom of speech and a diverse category of other freedoms that many other countries do not.

Hope this helps!

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

on my last question