r/IndianHistory•2 mo. agoGood_Maintenance_798Second-Wave Civilizations Population Centers c. 500 BCE and 200 CEClassical 322 BCE–550 CEA map illustrating the rise and spread of the Second-Wave Civilizations between c. 500 BCE and 200 CE, including the most notable urban settlements where civilizations flourished, transforming societies through trade, cultural exchange, and intellectual growth. Source: Second-Wave Civilizations Population Centers - World History EncyclopediaPosted Jul 23, 2026, 10:21 AM UTC82ShareSave