A few thousand years ago, governments were instituted among men when a few guys (and they were indeed guys!) decided that there were easier ways to survive than actually working for a living. Random, uncoordinated plunder was a bit hazardous: the victims might turn out to be armed and might fight back. Better to erect a systematic regime of domination in which much of the wealth of the productive people could be transferred to the ruling elite and their friends - i.e., the government.
Government is an organization that routinely carries out, in broad daylight, actions - such as theft, murder, etc. - that ordinary criminals commonly feel constrained to carry out under cover of darkness.
Libertarians are people who think that we ordinary folks have suffered enough, and that it is time to stop the systematic plunder and murder.
There has, for several decades, been a deep fissure in the libertarian movement. On the one side have been the realists who insist on looking at government as it has actually functioned and who try to figure out how government can actually be abolished: the leading intellectual in this group is the late Murray Rothbard; a well-known political leader is Congressman Ron Paul.
The other group of libertarians, on exhibit in this book, might be called the "conceptual libertarians," people who are more interested in chewing over the "true" concept of government, or the "real" meaning of anarchism, than in addressing the horrendous crimes carried out by actually existing governments, now and throughout history, in the real world.
Several of the authors on exhibit in this book are followers of the late Ayn Rand, and, given the well-known "essentialist" views that Randians tend to take towards concepts, they fit in well here.
Tibor Machan's essay is a nice example: Machan starts off by promising to "show that both individualists anarchists - those who reject government but embrace law and order for a society - and minarchists - those who support a properly limited government as an agency for administering it - are right and their differences are mostly apparent."
I myself met Machan almost thirty years ago, and I found him to be an unintelligent and rather vacuous individual. His essay exhibits those traits clearly: by the end of his meandering and nearly incoherent essay, we find that his promised reconciliation between opponents of government and defenders of the state, such as himself, consists simply in an insistence that opponents of the state must accept that the closest they should ever demand to actual freedom from the state is the right to emigrate from one nation-state to another: "My view... is that the appropriate form of competition would involve emigration and immigration..." In short, in the words of the old rednecks, "Love it or leave it!"
Machan doesn't really mean even this, since he helpfully adds, "I will only mention that I am not in principle against world government..." Of course, world government would eliminate any possibility of emigration or immigration altogether, unless, perhaps, one intends to emigrate to Mars!
Randian Adam Reed offers us a supposed proof that a society free of government is not possible by relating the sad, centuries-long tale of the government of Poland: as he tells the story, a rather vicious, decentralized, oligarchical government was established by King Vladislav IV in 1320, and it exploited, controlled, and terrorized the Polish people for nearly five centuries.
Assuming his tale is accurate, this would seem to be a strong indictment of government. Why he views it as proof that society free of government is a bad idea, when the real problem was a viciously tyrannical government, remains a mystery to the curious reader.
Perhaps the strangest essay in the book is Charles Johnson's "Liberty, Equality, Solidarity: Towards a Dialectical Anarchism." Much of Johnson's essay is taken up with hair-splitting discussions of the exact distinction between minimal government and anarchism. But he truly goes off the deep end when he approvingly quotes the radical feminist Susan Brownmiller: "rape... is nothing more or less than a conscious process of intimidation by which all men keep all women in a state of fear."
That claim is of course nothing more or less than a conscious lie by which Brownmiller viciously libeled all adult males for the criminal acts of a small number of males.
Johnson should know better. I know Johnson personally: while he can be a thoughtful and intelligent person, he also flies far too often into this sort of viciously authoritarian nonsense.
The one first-rate essay in the book is John Hasnas' "The Obviousness of Anarchy." Hasnas focuses not on conceptual hair-splitting but on real-world examples of social institutions and how humans can and have established rules, resolved disputes, etc. without government. I differ with some of Hasnas' conclusions, but his discussion is informative and thought-provoking.
Rod Long's "Market Anarchism as Constitutionalism" is also worth reading. Although Long is an academic philosopher, unlike most of his colleagues, he does try honestly to envision what abstract ideas actually boil down to, concretely, in the real world. The result is a both a substance and a writing style that is more comprehensible than, say, Tibor Machan's.
As a point-counterpoint between limited-governmentalists and anarchists, this book is simply a failure: the limited-governmentalists have nothing really worth saying.
But the essays by two of the anarchists, Long and Hasnas, are worthwhile.
This is generally true of the literature on libertarianism: the supporters of limited government are, when all is said and done, statists who simply wish a slightly more constrained state. Intellectually, their position is incoherent; in practice, they are apologists for the status quo: the limited-government Libertarian Party recently nominated the right-wing, former GOP Congressman Bob Barr as their Presidential candidate!
To delve deeper into anti-government libertarianism, see Rothbard's "The Ethics of Liberty" or his "Egalitarianism as a Revolt Against Nature and Other Essays," Friedman's "The Machinery of Freedom," or Hoppe's "Democracy: the God that Failed."