From our Founding Fathers:

"... We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.

-- That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --

That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness...."

"...That mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed.."

Read the entire Declaration of Independence here

"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America..."

Read the entire US Constitution here

"Congress shall make no law....abridging the freedom...to petition the Government for a redress of grievances."

Read the entire Bill of Rights here