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.

>>28
here's a summary of the last part
http://dis.4chan.org/read/newpol/1180954230/836
following that is ~200 posts of the same retard mentioned there repeating claiming bush is socialist by making up definitions, and ensuing ownage.