Stupid human race

On looking closely, i could see that humans are the one's who are the most stupid, the rest of the animals have understood far more than what we think they have understood.
This race seems to be completely out of place, they do not know how to handle Intelligence, nor emotions, nor spirituality nor the powers. extremely stupid, the few who are a little aware are happily exploiting the rest who are not. Here is a open challenge, can somebody answer any one of the following questions convincingly?
Why do we have governments? why do we fight? why do we possess things? how do you know what do we know, we know? so while answering keep in mind that you need to convince not me, but yourself of the answer!! look at history, there has been beliefs and some group has been fighting with the other groups on making attempts to convince them of their belief to be true, see, no body knows anything, it is all beleifs, so the group which was powerful was making the other groups beleive, and this true of everything, god, religion, society, culture, business etc,.
why do we live the way in which we live? is this the only viable form, what are the other forms that we have tried? what were the attempts made?
in fact a good start to these questions should come from being able to look things objectively, but that is a rare commodity.