"The time to guard against corruption and tyranny, is before they shall have gotten hold of us. It is better to keep the wolf out
of the fold, than to trust to drawing his teeth and claws after he  shall have entered." (Notes on Virginia, Query XIIV). THOMAS
JEFFERSON ON DEMOCRACY 162 (S. Padover Ed. 1953).
http://www.archives.gov/national-archives-experience/charters.html