ancestors may have practiced polygyny, or a form of serial monogamy, as is found in some primates, such as chimpanzees. In this system males and females form consort bonds for the duration of raising a child, and remain with one another, although not necessarily exclusively, throughout the duration. This fits well with the "four-year itch" psychological phenomena, as the four years of consort would be the approximate time that male and female humans would tend to remain together in a "state of nature." In this explanation for monogamy, a pair is monogamous only for the sake of child rearing and then is free to move onto the next mate. Thus, it can be concluded that the "state of nature" once thought to have belonged to humans, that of Jean Jacques Rousseau's Noble Savage, is clearly one that needs revision, as humans gain more insight into their true "state of nature." Primate models have served very well to provide this insight, as humans have learned that social organization is, indeed a compromise between individuals, as they compete for resources, of which sex is paramount. Since so much is founded on the human "state of nature" assumed by the philosophers of the past, however, we must careful how much we allow to be affected by our greater knowledge of our past. If humanity were to restructure its entire society based on our knowledge of our past, we would merely be removing the most important element of the past million years of our evolution - culture. We must accept this knowledge of the true state of human nature as explaining certain aspects of human behavior, but not allow this knowledge to shake the very foundations of what has allowed us to reach this state - a state where humans are able to recognize where we came from and how they got there. [ed. - references available upon request]