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The obvious conclusion would be that in such close proximity, and with no actual competition for resources, rat-society is a big no-go.

it's not obvious to me...'splain it please.

while your at it please explain why you think that calhoun was mentally unstable and why his hypothesis has no relation to humans?

I never said that he was mentally unstable.
It is obvious. The rats declined into cannibalism and violent primacy, despite having all of their immediate needs met.

I happen to think his experiment was very fascinating. I don't necessarily believe it's an accurate reflection of human society, however.

Calhoun, among many others in comparitive psychology, a complete lunatic?

logical fallacy that a utopia could even exist in the first place.

?

It's called the utopia fallacy, or nirvana fallacy.
http://www.claremont.org/crb/article/the-utopian-fallacy/

Also that was obviously a question, indicated by both the phrasing and punctuation.

do you have any data to support your contention?
have you read any history?
do you follow the news?

I was actually just reading the national geographic's timeline of history. I'm mostly into ancient civs.