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.

>>162
>Does communism tend towards war, I would say yes on the grounds that communism is usually statist.
US is less statist than Sweden. Therefore US is less warmongering?

Libertarian logic lol.