The Indus Valley Society

They had a caste system, splitting the population among groups such as priests, warriors, merchants, or peasants.

They practised trade, using seals as identification numbers on products. Their products even reached Mesopotamia, while archeologists also found bronze in the Indus Valley, which is not native to the region (so it must have been brought or traded).

They were also, according to archeological findings, a peaceful society.