This research series is based on thousands of observations of everyday human behavior. These observations are used to construct models of human nature, encompassing feelings, consciousness, decision making, aesthetics, etc. These models apply to humans cross-culturally. Interestingly, many of these same models apply to other animal species. This research does not maintain a separation of humans from other species. It does not assume that everything humans do originated with humans and began with human evolution. Instead, a great deal of human nature is based on common animal behavior. These observations and models are presented in detail in Volume One through Volume Ten and in future volumes of this research series.