Hans-Hermann Hoppe, The Intellectual Incoherence of Conservatism

Something that caught my eye:

I do not wish to explain here the economic nonsense of Buchanan's and his theoreticians' even further-reaching idea of protectionist policies (of protecting American wages). If they were right, their argument in favor of economic protection would amount to an indictment of all trade and a defense of the thesis that each family would be better off if it never traded with anyone else. Certainly, in this case no one could ever lose his job, and unemployment due to "unfair" competition would be reduced to zero.

That is a bit of a leap -- what determines relations within a polity does not necessary apply to relations between polities, or individuals from different polities. Trade is primarily for the sake of supplying what is lacking, either in families or the polity taken as a whole, but neither the activity or the things it makes available is the highest good of the polity -- both are subordinate to the common good.