The Indus Valley Civilization, existing from 3000 to 1500 B.C., was one of the world's first great urban civilizations, with major cities like Harappa and Mohenjo-Daro known for their advanced urban planning, agriculture, and trade. The civilization thrived on agriculture and commerce, developing sophisticated architecture and social organization, yet its decline remains a mystery linked to potential climatic changes and shifts in population. Key artifacts and structures, such as the Great Bath and unique figurines, offer insights into their culture and social practices.