The existence of the man is useless. It does not have any direction. And it is besides the same thing for all the alive species that we know today. However, we are most unhappy of all the species because the destiny gave us this poisoned gift which is the reason and that is what distinguishes us from the others (trumpets and brass bands...) since the paddle of humanity. We are thus the only ones with knowing that we know. We are the only ones with being able to realize that our existence is meaningless. The roof of the irony is that the reason precisely allowed us to learn that it itself was subjected to our passions. A little with the manner of Hobbes which posed the inequation passion reason as being a form of brutal hedonism, thus explaining the need for the man to have the capacity on the things, even nature, and to adapt them. It results from it then another need, corollary that one, that to obtain a state to protect these assets without what, anarchy would end up reigning.