Why are many of our addictions strange to others and inexplicable to ourselves? Why do a few years of childhood mean as much to us as the rest of our lives? Why do teenagers like to gather in persistent noisy companies and sometimes become uncontrollable? Why is love blinding? What form of marriage is "natural" for a person? Where do aggressiveness, fear, subordination come from? What is the natural nature of power? All these questions can be answered in the prehistoric past of man, in his biological beginning.