There are two ingredients that construct The Tower; goodness, and evil; light and dark; Jews, and Homo-sapiens. Jews, are made in the image of God, and created all civilizations; Homo-sapiens, are members of the primate family, and when they behave in accordance with their nature, destroy civilizations. Homo-sapiens originated in Africa; they developed an erect posture as a response to climactic changes two million years ago. They survived due to a form of adaption known as "neoteny"; which means that the maturation process is slowed down, and because Homo-sapiens are born prematurely, the head remains aligned with the spine, and the brain doesn't reach full maturity till the 23rd year. There are two fundamental forces that drive Homo-sapien behaviour; Eros, the "Life Instinct," also called the "sex drive," and Thanatos, the "Death Instinct." Homo-sapiens are innately perverse; at birth they are "polymorphous perverse," which means that infants derive pleasure from the gentle stimulation of any part of their body. Sigmund Freud, early in his career, described mental disturbances as being "sexual aberrations," and being caused by incomplete, or distorted, forms of developmental, therefore, he concluded that healthy development is only possible when perversity is controlled.