Libertarianism is a doctrine concerning the primacy of negative property rights.
That means that a person's body and property are protected from invasion/violation.
If you need to summarise libertarianism with one word, that word would be "nonagression". The only legitimate use of aggression against someone body or property is the direct agression by that person against other's body/property.
While libertarians would like the Constitution to replace what we have now, in view of libertarians the Constitution is still a flawed document illegitimately limiting people's freedoms.
Gunslinger, do you need good links to the libertarian resources? The libertarian party is not the best one. Plenty of libertarians make quite a distinction of being small 'l' libertarians rather than the party members.
In fact nominating a libertarian candidate goes against the libertarian philiosophy. The goal of libertarianism is not go get control of the state power but to limit that power to withing it's legitimate boundaries.
miko