Pre-Aryan civilization

Archaeological discoveries at Mehrgarh in present-day Baluchistan show humans inhabited the region as early as 7000 BCE. From about 3000 BCE the Indus River basin was home to the Indus valley civilization, one of the earliest in human history. At its height, it boasted large cities like Harrapa (near Sahiwal in West Punjab) and Mohenjo Daro (near Sindh). The civilization declined rapidly after the 17th century BCE, for reasons that are still unexplained.