How have the Constitution and the Bill of Rights made it possible for Americans to enjoy the rights to "life, liberty, and the pursuit of...

The Constitution and the Bill of Rights have helped allow
Americans to enjoy the rights you mention by setting up a form of government that is
effective but limited.

To keep the rights mentioned, we
need a government.  The government protects our rights by doing things like creating
police departments and military forces to protect our lives.  However, when we create a
government with this much power, it can be a danger to us because it might use its power
to take away our rights.  The Constitution and Bill of Rights help to prevent this in
two major ways.

• Separation of powers and checks
  and balances.  These things make it harder for one person or part of government to be
  strong enough to tyrannize us.


• Limited government.  The
  Constitution and Bill of Rights specifically list things that the government may not do
  to us.

Thus, the Constitution and Bill of
Rights protect the rights promised to us in the Declaration by creating a government
that is powerful, but which has limitations placed on it.