Welcome to the Beginning of Human Civilization At the dawn of human civilization, people lived in small, nomadic, hunter-gatherer tribes of around 200 members. With no knowledge of agriculture, their lives revolved around the pursuit of food. They constantly moved to follow migrating animals, escape predators, and adapt to changing weather patterns. Within each tribe, a few dominant males—often called "alpha men"—emerged as leaders due to their physical strength and hunting prowess. These men secured more resources and fathered most of the tribe's children. This dynamic is still observable in some remote tribes today, such as the Yanomami people in Brazil. T I M E    O V E R Back to the 21 st Century Geneticists suggest that many people today descend from a surprisingly small number of ancient individuals, reinforcing theories of tribal dominance and selective reproduction during prehistoric times. What Changed With Agriculture? Once humans ...