Posts about the social phenomenon of life, exploring how the various current species can group together with a special focus on the evolution of human social behavior as evidenced by paleoanthropology as well as archaeology and written history. From a neuropsychological perspective, the content addresses the organizations of bands, tribes and national republican states, understanding how the adequacy of decisions made by each individual is based on assessments of benefit, risk and cost, both personal and social, being more diverse the more diverse the behavior of the individuals that make up each society.