Many of the freedoms we have enjoyed in this nation is based on that principle. But even though being based on that principle has it always been followed justly, NO! Depending on the people in office the Government of that time and the people of that time not everyone has enjoyed all the justices endowed by it. "We the People" is just that "We The People" and covers just that, "We The People." Some people want to read "We The People" as pertaining to only certain people because women and others where excluded in many ways in the past. But that was not the fault of what was written it was the fault of how it was implemented at that time as the Document is Beautifully Written.
This Document belongs to the people and can be read here.
http://constitutionus.com/
Quote

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, 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.