Here's a good essay.
THE QUESTION LIBERTARIANS JUST CAN'T ANSWER
THE QUESTION LIBERTARIANS JUST CAN'T ANSWER
Why are there no libertarian countries? If libertarians are correct in claiming that they understand how best to organize a modern society, how is it that not a single country in the world in the early twenty-first century is organized along libertarian lines?
It’s not as though there were a shortage of countries to experiment with libertarianism. There are 193 sovereign state members of the United Nations—195, if you count the Vatican and Palestine, which have been granted observer status by the world organization. If libertarianism was a good idea, wouldn’t at least one country have tried it? Wouldn’t there be at least one country, out of nearly two hundred, with minimal government, free trade, open borders, decriminalized drugs, no welfare state and no public education system?