Sigmund Freud, Rene Descartes, and B.F. Skinner all share different beliefs and ideas regarding mankind and man's place in society. There are many distinctions between the three on the subjects of individuality and religion. The mind and body relationship also varies.
Freud believes that the individual is helpless to his/her animal instincts and primal desires. Man possesses only a small amount of self-control. This self-control is simply self-awareness. Man is aware that he is a living, breathing being who must interact with other people in a conformed society. The organization and rules of a civilization repress man's primal desires. He is constantly faced with trials and tribulations in which he is expected to respond to in a civilized manner. According to Freud, this repression only leads to bigger problems and ultimately it is the cause of man's unhappiness. The response to these problems is guilt. Guilt is a civilized way of expression. If man would only follow his instincts, those that have been biologically and genetically implanted within him, the world might be a different and possibly better place. Presently, man is just a wild animal trapped in a cage.