Ludwig von Mises
“It is only thus that one can understand how it was possible for people to go so far as to reproach liberalism [libertarianism] for its “hostility” or enmity towards the state. If I am of the opinion that it is inexpedient to assign to the government the task of operating railroads, hotels, or mines, I am not an “enemy of the state” any more than I can be called an enemy of sulfuric acid because I am of the opinion that, useful though it may be for many purposes, it is not suitable either for drinking, or for washing one’s hands.”– Ludwig Von Mises
Gotta love this guy. You can read some of this groundbreaking work here. He won the Nobel Prize in 1976.