Iron was first processed into tools in Asia Minor by the Hittites. Iron ore, charcoal, and advanced technical skills were required to smelt iron. The Vedic people in India underwent a revolutionary change in agriculture by using iron weapons and tools to cut down trees, break stones, plow soil, hunt animals, and more. This led to increased trade and the use of punch-marked coins for exchange. Meanwhile, Greek and Roman civilizations developed during the Iron Age and made major contributions to philosophy, mathematics, theater, medicine, history, sculpture, geography, art, literature, and architecture. Indian society was stratified through the caste system, dividing people based on profession into Brahmins, Kshatriy