What were the reason for first great human to migrate?

The first great human migrations were primarily driven by the search for food and resources, as early humans followed animal herds and seasonal vegetation. Environmental changes, such as the end of the last Ice Age, created new habitats and opportunities for survival. Additionally, social factors, such as population pressures and the desire for new territory, also played a significant role in the migration patterns of early humans. These movements ultimately led to the spread of Homo sapiens across various continents.