Four important pre-historic ages in India are discussed:
1. Paleolithic Age (Old Stone Age) where man used basic stone tools for hunting and tasks.
2. Mesolithic Age (Intermediate Stone Age) where man began to develop new skills.
3. Neolithic Age (New Stone Age) where man developed improved stone tools and new civilizations.
4. The Age of Metals where gold, then copper, and later bronze and iron were discovered and used, marking further advances in civilization.
Though knowledge of prehistoric India is limited, these ages were important in developing early human skills, inventions, and civilizations.