Libertarianism is bad because it is essentially Marxism. It asks for no regulation, no oversight, and to allow the markets do as they please. That is great in theory, but the problem is that many companies become so big that no other business can compete in that field. What you end up with is a business/corporation that rules that field of business and they charge you whatever the hell they want for the product. Then people become too poor to buy stuff and we end up in a socialistic environment because the poor cannot afford anything.