It is no crime to be ignorant of economics, which is, after all, a specialized discipline and one that most people consider to be a โdismal science.โ But it is totally irresponsible to have a loud and vociferous opinion on economic subjects while remaining in this state of ignorance.
Murray RothbardNo one may threaten or commit violence ('aggress') against another man's person or property. Violence may be employed only against the man who commits such violence; that is, only defensively against the aggressive violence of another. In short, no violence may be employed against a non-aggressor. Here is the fundamental rule from which can be deduced the entire corpus of libertarian theory.
Murray RothbardPositivism eliminates any kind of natural law principle - for example, that there are economic laws which can be transgressed only at your peril. With positivism, there is a tendency to leap into ad hoc economic theory.
Murray Rothbard