Why is libertarianism so infallible?

Libertarianism is the inclusion of every sapient being into the decision making process and all that logically follows from that. Utilitarianism is the objective of ensuring the most happiness for all sapient beings and all that logically follows from that. Sometimes they compliment each other, other times they contradict.

Discuss.

>>117
As has already been explained here >>114, libertarianism is about providing the freedom necessary for people to utilise their skills in the free market. State capitalism is flawed, but there is nothing wrong with the free market.
>>118
What's wrong with patriotism and national self-determination? The ideals in the past that people have fought for and became a reality are about freedom, those which do not succeed consist of volumes of ideology which intrude on every aspect of life. Whether it's islamic extremism or some other religion like socialism, totalitarianist ideals always leads to a military dictatorship.