But Dr. Rothbard and his merry anarchists wish to live their fanatical antistatism, and the result is a collision between the basic policies they urge and those urged by conservatives who recognize that the state sometimes is the necessary instrument of our proximate deliverance. The defensive strategic war in which we have been engaged over a number of years on myriad fronts cannot be prosecuted by voluntary associations of soldiers and scientists and diplomats and strategists, and when this obtrusive fact enters into the reckonings of our state-haters, the majority, sighing, yield to reality, whereas the small minority, obsessed by their antagonism to the state, refuse to give it even the powers necessary to safeguard the community.
Buckley notes that while reviewing Rothbard’s book Man, Economy, and State for National Review in 1962, Henry Hazlitt has observed that Rothbard suffers from “extreme apriorism”:
And Mr. Henry Hazlitt, reviewing enthusiastically Dr. Rothbard's magnum opus, Man, Economy, and State for National Review in 1962 paused to comment, sadly, on the author's "extreme apriorism," citing, for instance, Dr. Rothbard's opinion that libel and slander ought not to be illegalized, and that even blackmail,
"would not be illegal in the free society. For blackmail is the receipt of money in exchange for the service of not publicizing certain information about the other person. No violence or threat of violence to person or property is involved." . . . When Rothbard [Mr. Hazlitt comments] wanders out of the strictly economic realm, in which his scholarship is so rich and his reasoning so rigorous, he is misled by his epistemological doctrine of "extreme apriorism" into trying to substitute his own instant jurisprudence for the common law principles built up through generations of human experience."Extreme apriorism"—a generic bullseye. If National Review's experience is central to the growth of contemporary conservatism, extreme apriorists will find it difficult to work with conservatives except as occasional volunteers helping to storm specific objectives. They will not be a part of the standing army, rejecting as they do the burden of reality in the name of a virginal antistatism.