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.

OH MAN I KNEW IT!!! IT'S A KOMMUNIST CONSPIRACY!!! AND THEY TOLD ME I WAS EPICALLY RETARDED WHEN I SAID I DIDN'T UNDERSTAND THE DIFFERENCE BETWEEN STATISM AND SOCIALISM, LOOK AT THAT LONG POST REPEATING THE SAME RETARDED BULLSHIT, NOW IT IS PROOVD, BEKUZ IT'S LONG TEXT!!!! BUSH IS SOOSHALIST!!! AND A LEFT-WING SOSHALIST!!