Max Borders writes about an "objection" to libertarianism:
You'll recognize this fallacy from the question, "Why does no libertarian country exist anywhere in the world?"
Embedded in the question is the assumption that libertarian countries don’t exist because they are fantastic creatures, like unicorns.
Remarkably, socialists use this argument precisely to support socialism. When challenged that every known socialist country has resulted in tyranny, repression, end of rule of law, vast prison camps for dissenters, destruction of the harmony of human interests, poverty, famines, ethnic cleansing, wars, and so forth, the socialists tell us that this happened because imperfect human beings have corrupted the genuine socialism, have deviated from the true teachings of Marx or Lenin or whoever. If only socialism was given a chance to exist in a pure pristine form, all would see how wonderful it would be.
But libertarians do not talk like this at all. They, too, acknowledge that we live in mixed economy, a semi-free society marked by both socialism for the rich and socialism for the poor. But they do not condemn the present state of affairs completely, as socialists do. They say that whatever success the present society enjoys is entirely due to what little freedom it permits to its members. The amount of freedom, however small, is a blessing rather than a "corruption" of libertarianism that has turned it upside down.
The socialists, on the contrary, do not say that the communist aspects of any society contribute to its success. According to them, any impure socialism is a monster. Libertarianism welcomes any liberty, any improvement in the political or legal system, any progress toward laissez-faire; socialists refuse to be convinced that socialism does not work until they have experimented with 100% pure communism.
"Of course, no socialist country exists anywhere in the world," socialists say. "Someday, we will establish a pure socialist commonwealth, and it will be glorious."
"The reason why no truly libertarian country exists anywhere in the world is that people's ideologies are infected with feudal and socialist influences," libertarians say. "But capitalism, to the extent that it is permitted to function, works wonders even now." "The truth is that capitalism has not only multiplied population figures but at the same time improved the people's standard of living in an unprecedented way. ... The market economy needs no apologists and propagandists. It can apply to itself the words of Sir Christopher Wren's epitaph in St. Paul's: If you seek his monument, look around." (HA, 854)