One of the foundational questions libertarians need to have a response to is the ever-popular "who will build the roads?" The question has a sort of superficial plausibility to it; most of the roads we see in our daily lives, after all, were built by, and are allegedly maintained by, some government or other. There is, however, no substance to the idea; the best and most concise explanation of how absurd this question is was given by Tom Woods, who said:
"Who will build the roads?" is the question that belongs at the top of every libertarian drinking game. If we didn’t have forced labor, the argument runs, there would be no roads. There’d be a Sears store over there, and your house over here, and everyone involved would just be standing there scratching their heads.
Clearly roads are a socially desirable good, and, given that it’s rather a challenge for people to get to work or go shopping — which is to say: produce or consume — without them, there’s quite an obvious and powerful incentive to build them. It should go without saying that, even in the absence of coercion, roads would get built. As to the specific question of who would build them, here it’s important for libertarians to be cautious; there’s a natural tendency to push the argument too far and attempt to outline some scheme by which we imagine the roads could be built, but, in reality, the most a libertarian can say in response to "who would build the roads if not the government" is "somebody else."