What does a constitution do?
A constitution provides the basic law of a body politic. The
constitution defines the government, describes how it is organized
and how the people who make it up are to be chosen and specifies
what powers the government can and can not exercise.
Michael Montagne Additionally, the Constitution of the United
States, which was completed after the Declaration of Independence
in the late 1770's, contains a group of special freedoms called the
Bill of Rights. These special freedoms were enshrined in the
Constitution by the founders of the country in order that they
always form a back-bone of liberty for America's citizens.
Included are (not in any special order) freedom of speech,
assembly, peaceful use of firearms in a state militia, press
freedom, freedom from unlawful search and seizure, freedom from
having military troops bedding in your home (a common breach with
the British back then).