Each of us has seen this scene at least once in our life: a dirty, ragged person zigzags on the street with an uncertain step, laughs for no reason and shouts something unintelligible, addressing himself or an invisible interlocutor, God or the Devil. We avert our eyes and make a mental promise to ourselves that we will never get to the point where this deranged creature planned such a life. What is behind the downfall of the common drunkard? Perhaps an unusual philosophy? Crisis in the nearest relationship? An excellent worldview that makes existence in society unbearable?