Modern economics is a set of formal models and equations purporting to fully determine human behaviour, at least in the economic realm. And there is no way that uncertainty can be compressed into determinate mathematical models.

The state has typically been a device for producing affluence for a few at the expense of many.

The libertarian must never advocate or prefer a gradual, as opposed to an immediate and rapid, approach to his goal. For by doing so, he undercuts the overriding importance of his own goals and principles. And if he himself values his own goals so lightly, how highly will others value them.

The more these readjustments are delayed ... the longer the depression will have to last, and the longer complete recovery is postponed.

What...can the government do to help the poor? The only answer is the libertarian answer: Get out of the way.

[W]hich category of crimes does the State pursue and punish most intensely? [T]hose against private citizens or those against itself? The gravest crimes in the State's lexicon are almost invariably not invasions of private person or property, but dangers to its own contentment, for example, treason, desertion of a soldier to the enemy, failure to register for the draft, subversion and subversive conspiracy, assassination of rulers and such economic crimes against the State as counterfeiting its money or evasion of its income tax.

Positivism 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.