How do we explain, predict and control human behavior? This question remains a central underlying theme within psychology as a whole. Few specific branches of psychology have attempted to integrate multiple perspectives within their fields of research. Evolutionary psychology appears to be unique in this endeavor, and as the following researchers point out, “Evolutionary psychology is the long-forestalled scientific attempt to assemble out of the disjointed, fragmentary, and mutually contradictory human disciplines a single, logically integrated research framework for the psychological, social, and behavioral sciences-a framework that not only incorporates the evolutionary sciences on a full and equal basis, but that systematically works out all of the revisions in existing belief and research practice that such a synthesis requires” (Tooby J. &.) .A unification of this type is unquestionably an enormous undertaking, but as the following review ventures, it is likely to be a worthwhile contribution to a number of existing disciplines. In order to reach any type of conclusion with regard to how much of human behavior can be explained by an evolutionary psychology framework, it is necessary to understand what the goals of such a subject area are: “The goal of evolutionary psychology is to study human behavior as the product of evolved psychological mechanisms that depend on internal and environmental input for their development, activation, and expression in manifest behavior” (Tooby J. &.). Like physiology, anatomy and biology, evolutionary psychology examines human behavior from a Darwinian perspective. That is, like physical traits, psychological traits can be transmitted genetically from parent to offspring. As Darwin proposed, those adaptations and variants that contributed most beneficially to both survival and reproduction of an organism within a given environment would occur in greater frequency in following generations than those that did not, thus resulting in species-typical characteristics. As put forth by researchers Tooby and Cosmides, natural selection of psychological processes occurs through three outcomes: 1. Adaptations: as demonstrated in traits which function to consistently solve specific adaptive problems of survival and reproduction. 2. Byproducts: or those non-functional characteristics which endure as a result of coupling with existing adaptations. 3. Noise: consisting of variability within a particular characteristic which may be the result of a genetic mutation or other random environmental factors. With this in mind, it appears that evolutionary psychology endeavors to explain the vast majority of human behavior. However, that is not to say that it is without its limitations in that respect. In the following analysis, I will attempt and overview of some generally established behaviors seen across both human and nonhuman animals that can explained by evolutionary psychology as having adaptive value, by-product characteristics and noise while also addressing some aspects of human behavior that evolutionary psychology has difficulty explaining under the current theoretical framework. One of the main criticisms levelled at evolutionary psychologists is that knowledge of human history is limited, and unknowable. As Tooby and Cosmides state,