Increase in Earth’s temperature melted the ice sheets making the climate warm and favorable for growing grass and other plants. This realization by man started the activity of agriculture and grass-eating animals and he developed from a nomadic to being a farmer and herder.
With agricultural activities developing, man stayed in one area for long time. Houses were built according to the climatic conditions like heat, rain, wind and cold. The early man settled down in groups with 2-3 generations living in each family and together these families formed a tribe.
Each tribe had its own unique traditions, language and music and every member in the tribe played a specific role. The historians have studied various archaeological sites to gather information on the early man.