One difference between libertarianism and socialism is that a socialist society can't tolerate groups of people practicing freedom, but a libertarian society can comfortably allow people to choose voluntary socialism. If a group of people — even a very large group — wanted to purchase land and own it in common, they would be free to do so. The libertarian legal order would require only that no one be coerced into joining or giving up his property.
"The Coming Libertarian Age" in Cato Policy Report (January/February 1997)
Libertarianism is not libertinism or hedonism. It is not a claim that "people can do anything they want to, and nobody else can say anything." Rather, libertarianism proposes a society of liberty under law, in which individuals are free to pursue their own lives so long as they respect the equal rights of others. The rule of law means that individuals are governed by generally applicable and spontaneously developed legal rules, not by arbitrary commands; and that those rules should protect the freedom of individuals to pursue happiness in their own ways, not aim at any particular result or outcome.David Boaz
Libertarians have always battled the age-old scourge of war. They understood that war brought death and destruction on a grand scale, disrupted family and economic life, and put more power in the hands of the ruling class — which might explain why the rulers did not always share the popular sentiment for peace. Free men and women, of course, have often had to defend their own societies against foreign threats; but throughout history, war has usually been the common enemy of peaceful, productive people on all sides of the conflict.David Boaz