Through careful examination of fossil remains found in the ground, a striking similarity can be drawn b

etween humans and primates. Studying the skull itself produces enough characteristics to directly link the two. By looking at the size of the cranium and the shape of the brain cavity, a person educated in this field would be able to tell the age of the subject, the size of the brain, and what species the fossil belonged to. The separation point between man and ape lies not in the teeth or the postural adaptations but the size of the brain, with the largest gorilla brain being 650cc and the smallest aborigine being 855cc, a mean brain volume of 750cc is where the line shall be drawn between man and ape (Keith 205-6). There is a continuing argument on whether the closest living primate to humans is the gorilla or the chimpanzee. The gorilla shares more physical features where as the chimpanzee holds more of the behavioral and intellectual characteristics. However, the main separation between humans and all other animals is the ability to reason. This trait gives humans an advantage over all other creatures because while the ape may chose to use the stick or bone as a weapon to hunt the man is the only one who would choose to form it into a blade and make a true weapon out of it. Although in a few instances it has been reported that chimps will purposely deceive the people or other chimps around them to get something they want. This has happened in the wild as well as in captivity. One can see that this type of behavior relates to human behavior quite easily. Two reasons Wrangham and Peterson believe that humans and chimpanzees share biologically fixed behaviors are (1) that they are more closely related to each other than chimpanzees are to gorillas and (2) that chimpanzees are a good model for our earliest ancestor and retain conservative traits that should be shared by both. The first of these statements is still hotly debated and, according to various kinds of genetic evidence, chimpanzees, gorillas, and humans are so close that it is difficult to tell exact divergence time or pattern between the three (Marks, Schmid and Sarich personal communication). Given sociobiological tenets, the claim that can now proceed from “known facts,” rather then mere theory,

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