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.

>>183
The US also gave industrial support to the USSR, does that mean the US is responsible for everything the USSR has done since it avoided obliteration by the nazis? I'm tired of demagogues who base their arguments on how "non-conformist" or "shocking" it is, when in fact most uptight conservative christians have heard the same arguments since the 60s and no one really cares anymore. The world is far more complex than that, go tell your conspiracy theories to 16 year old girls who listen to greenday.