I like john stuart mill's essay on liberty, as it is more rich and eloquent than mere dictionary thinking. Liberty historically involved the right of the governed to be spoken for by his/her government... and only more recently has come to be defined as those limits and rights.
Sadly you're right. Ignorant criminals run america, but has that not always been the case... truly. The criminal conspiracy to overthrow democracy is institutionalized in america like nowhere else. Jefferson would clearly have counselled more firm measures.... as is the right of the governed when government is criminal.
...
The aim, therefore, of patriots, was to set limits to the power which the ruler should be suffered to exercise over the community; and this limitation was what they meant by liberty. It was attempted in two ways. First, by obtaining a recognition of certain immunities, called political liberties or rights, which it was to be regarded as a breach of duty in the ruler to infringe, and which, if he did infringe, specific resistance, or general rebellion, was held to be justifiable. A second, and generally a later expedient, was the establishment of constitutional checks; by which the consent of the community, or of a body of some sort supposed to represent its interests, was made a necessary condition to some of the more important acts of the governing power.
...John Stuart Mill - "On liberty"
http://www.fordham.edu/halsall/mod/jsmill-lib.html