Libertarians have an almost infinite optimism in the wisdom and altruism of their fellow man, despite mountains of evidence to the contrary.
Scratch a libertarian and you will find a person whose ideology gleefully embraces the notion that such things as traffic lights are an unneccessary imposition of a dark and arbitrary facistic government power -- a tri-hued symbol of the dead hand of bureaucracy, if you will -- on the self sufficent yeoman spirit of the American individual.
Meanwhile, those of us stuck here on the endlessly messy and unnervingly uncategorizable miasma that is planet Earth, those of us who have lived here long enough to have actually tried to cross a busy intersection with a non-functioning traffic light put these earnest young ideologues in the same remainder bin with all the other angry, insistent ideologues -- communists, neocons, flat-earthers, Reaganites, dittoheads, neo-nazis, creationists -- and gladly if wearily accept a country where our meat is inspected.
Mention Hobbes to a libertarian and they will tell you Calvin was the real star of that comic strip, and mourn its short, brutal existence. Libertarians yearn for a return to a past that never was.